An axle drive shaft surface spraying device

Abstract

The utility model relates to a kind of axle drive shaft surface spraying device, it is related to spraying device technical field, including spraying chamber, spraying chamber end is equipped with workpiece import and export, slidingly equipped with support plate in spraying chamber inner wall, support plate end is fixedly equipped with closure plate, support plate top is equipped with fixedly arranged fixed U-shaped frame and several horizontally slidingly arranged mobile U-shaped frame, the opposite inner wall of fixed U-shaped frame and mobile U-shaped frame is rotatably equipped with clamping box, the opposite end of clamping box is all equipped with slidingly arranged positioning column, the below of clamping box is vertically lift and is equipped with lifting plate, the end of fixed U-shaped frame and mobile U-shaped frame is all fixedly equipped with several fixed rods, the end of mobile U-shaped frame is equipped with several avoiding slot, and the one end of fixed rod extends into the avoiding slot of adjacent mobile U-shaped frame with it and is fixedly connected with stop plate.The utility model solves the problem of low coating transfer rate of existing spraying device;Feeding preparation process and discharging post-processing process complex problem.

Description

Technical Field

[0001] This invention relates to the field of spraying equipment technology, specifically to a spraying device for the surface of a vehicle axle drive shaft. Background Technology

[0002] The axle driveshaft is a key component of a vehicle's transmission system, mainly composed of the axle tube and the universal joint forks at both ends. Its core function is to stably transmit power to the wheels, ensuring reliable vehicle operation under various complex road conditions. To cope with harsh environments such as rain and mud, and to prevent the axle driveshaft from failing due to corrosion or aging, its surface is usually coated. The coating mainly covers the outer walls of the axle tube and universal joint forks to form an effective protective layer. However, the inner wall of the universal joint fork, as a core moving contact surface, is prone to coating buildup and abnormal clearance if coated, which can lead to component jamming or movement interference. Therefore, the inner wall of the universal joint fork is usually not coated.

[0003] The existing spraying equipment has gradually revealed its shortcomings during use, mainly in the following aspects:

[0004] First, the paint transfer rate is low. Specifically, when painting the axle drive shaft, the axle drive shaft needs to be placed on the painting table and clamped and fixed by a rotating fixture. The rotating fixture drives it to rotate at a constant speed, while the paint spray gun sprays the surface. In order to avoid interference between adjacent axle drive shafts during rotation, sufficient clearance space must be maintained between the workpieces. When the spray gun sprays paint, some paint will directly pass through the clearance space between the axle drive shafts and scatter into the non-painted area. This not only causes a lot of paint waste, but also significantly reduces the paint transfer rate in the painting process, resulting in increased production costs.

[0005] Secondly, the preparatory process for loading and the post-processing process for unloading are complex. Specifically, since the inner wall surface of the universal joint fork at both ends of the axle drive shaft is the core moving mating surface, it needs to be protected during the spraying process. Therefore, masking tape needs to be used to cover this area before loading. After the spraying process is completed and the material is unloaded, these tapes need to be removed. Therefore, the preparatory process for loading and the post-processing process for unloading are complex.

[0006] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a vehicle axle drive shaft surface spraying device. This device can arrange the vehicle axle drive shaft at the minimum distance when spraying it, thereby minimizing the hollow area between the workpieces, reducing paint waste, and improving the paint transfer rate.

[0008] When the axle drive shaft is positioned after loading, the device can shield and protect the inner wall 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-applying masking tape and subsequent peeling and cleaning, simplifying the preparatory process before loading and the processing flow after unloading.

[0009] To address the above problems, the present invention provides the following technical solution:

[0010] A surface coating device for a vehicle axle drive shaft includes a coating chamber with a workpiece inlet and outlet at one end. A support plate is slidably mounted on the inner wall of the coating chamber, and a closing plate is fixedly mounted at the end of the support plate. A fixed U-shaped frame and several horizontally slidable movable U-shaped frames are fixedly mounted on the top of the support plate. Clamping boxes are rotatably mounted on the inner walls of the fixed and movable U-shaped frames. Positioning posts are slidably mounted through the opposite ends of the clamping boxes. A lifting plate is vertically raised and lowered below the clamping boxes. Several fixing rods are fixedly mounted at the ends of the fixed and movable U-shaped frames. Several clearance grooves are provided at the ends of the movable U-shaped frames. One end of each fixing rod extends into the clearance groove of the adjacent movable U-shaped frame and is fixedly connected to a stop plate. A coating and drying assembly for coating and drying the vehicle axle drive shaft is provided at the top of the coating chamber.

[0011] As an optimized solution, the spray drying assembly includes a movable support, two sliding blocks are slidably provided on the top of the spray chamber, the movable support is fixedly connected to the sliding blocks, a number of paint spray guns and air distribution boxes are fixedly provided through the top of the movable support, the paint spray guns and air distribution boxes are alternately arranged, a number of exhaust holes are provided at the bottom of the air distribution box, the paint spray guns are connected to an external paint pressure tank, and the air distribution box is connected to an external industrial hot air blower.

[0012] As an optimized solution, an adjusting motor is fixedly installed at one end of both the fixed U-shaped frame and the movable U-shaped frame. The output shaft of the adjusting motor is fixedly connected to one of the clamping boxes. A rotating shaft is rotatably installed through the other end of both the fixed U-shaped frame and the movable U-shaped frame. The rotating shaft is fixedly connected to another clamping box.

[0013] As an optimized solution, both the fixed U-shaped frame and the movable U-shaped frame are provided with horizontally movable connecting plates at their ends. The upper end of the connecting plate is fixedly provided with a positioning shaft, the outer wall of the positioning shaft is provided with an external spline, and the end of the rotating shaft is provided with an internal spline.

[0014] As an optimized solution, the inner walls of both the fixed U-shaped frame and the movable U-shaped frame are fixedly equipped with several drive telescopic cylinders, and the telescopic ends of the drive telescopic cylinders are fixedly connected to the connecting plate.

[0015] As an optimized solution, a movable plate is slidably provided on the inner wall of the clamping box, and two inclined drive plates are fixedly provided at the end of the movable plate. One end of the drive plate obliquely penetrates the positioning column and is slidably connected to it. An internal telescopic cylinder is fixedly provided on the inner wall of the clamping box, and the telescopic end of the internal telescopic cylinder is fixedly connected to the movable plate.

[0016] As an optimized solution, a partition is fixedly installed on the lower inner wall of the spraying chamber, and a number of electrically controlled telescopic cylinders are fixedly installed on the top of the partition. The telescopic ends of the electrically controlled telescopic cylinders are fixedly connected to the sealing plate.

[0017] As an optimized solution, both the fixed U-shaped frame and the movable U-shaped frame are fixedly equipped with lifting and telescopic cylinders on their respective inner walls, and the telescopic ends of the lifting and telescopic cylinders are fixedly connected to the lifting plate.

[0018] As an optimized solution, a control telescopic cylinder is fixedly installed at the bottom of the support plate, and the telescopic end of the control telescopic cylinder is fixedly connected to the outermost movable U-shaped frame.

[0019] As an optimized solution, two lead screws are provided at the top of the spraying chamber, and fixed plates are fixed at both ends of the lead screws at the top of the spraying chamber. The two ends of the lead screws are rotatably connected to the two fixed plates. The lead screws pass through the sliding block and are threadedly connected to it. Servo motors are fixed at the ends of the two fixed plates, and the output shafts of the servo motors are fixedly connected to the lead screws.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. During loading, the lifting telescopic cylinder moves the lifting plate upward to the preset height, inserting the universal joint forks at both ends of the axle drive shaft into the two clamping boxes inside the fixed U-shaped frame or the movable U-shaped frame, until the universal joint forks at both ends of the axle drive shaft are abutting against the lifting plate. The built-in telescopic cylinder then moves the movable plate and drive plate horizontally, causing the positioning pin to slide outward. The positioning pin protrudes from the clamping box and passes through the hole in the universal joint fork (the positioning pin protrudes from the universal joint fork), thereby clamping and fixing the axle drive shaft. After the axle drive shaft is clamped on both the fixed U-shaped frame and the movable U-shaped frame, the lifting plate resets, and the electrically controlled telescopic cylinder moves the sealing plate and support plate into the spraying chamber. The process continues until the sealing plate closes the workpiece inlet and outlet. After the axle drive shaft is sprayed and dried in the spraying chamber, the above process can be reversed to remove the finished axle drive shaft. During the spraying process of the axle drive shaft, the clamping box and positioning column can shield the inner wall surface and holes of the universal joint fork at both ends of the axle drive shaft to prevent them from being sprayed. When the axle drive shaft 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the top of the support plate of the present invention;

[0029] Figure 3 This is a schematic diagram of the internal structure of the movable U-shaped frame of the present invention;

[0030] Figure 4 This is a cross-sectional view of the movable U-shaped frame and the fixed U-shaped frame of the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of the spray drying assembly of the present invention;

[0032] Figure 6 This is a schematic diagram of the internal structure of the spraying chamber of the present invention;

[0033] Figure 7 This is a schematic diagram of the air distribution box of the present invention;

[0034] Figure 8 This is a schematic diagram of the positioning shaft and rotating shaft of the present invention;

[0035] Figure 9 This is a schematic diagram of the internal structure of the clamping box of the present invention;

[0036] Figure 10 This is a schematic diagram of the axle drive shaft of the present invention;

[0037] Figure 11 This is a schematic diagram of the structure of the present invention when spraying the narrow surface of the axle drive shaft;

[0038] Figure 12 This is a schematic diagram of the structure of the present invention when spraying the wide surface of the axle drive shaft.

[0039] 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

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] The working principle of this device is as follows:

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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. An axle drive shaft surface spraying apparatus, characterized by: Including spray booth (1), the spray booth (1) end is equipped with workpiece inlet and outlet (2), the inner wall of the spray booth (1) is slidably provided with a support plate (4), the end of the support plate (4) is fixedly provided with a closing plate (3), the top of the support plate (4) is provided with a fixedly arranged fixed U-shaped frame (6) and a plurality of horizontally slidably arranged movable U-shaped frames (5), the opposite inner walls of the fixed U-shaped frame (6) and the movable U-shaped frame (5) are rotatably provided with clamping boxes (8), the opposite ends of the clamping box (8) are provided with slidably arranged positioning columns (21), the lower portion of the clamping box (8) is vertically provided with a lifting plate (9), the ends of the fixed U-shaped frame (6) and the movable U-shaped frame (5) are fixedly provided with a plurality of fixed rods (15), the ends of the movable U-shaped frame (5) are provided with a plurality of avoiding grooves (16), one end of the fixed rod (15) extends into the avoiding groove (16) of the adjacent movable U-shaped frame (5) and is fixedly connected with a stop plate (17), the top of the spray booth (1) is provided with a spraying and drying assembly (27) for spraying and drying the axle drive shaft (34). The spraying and drying assembly (27) comprises a movable support (24), two sliding blocks (30) are slidably arranged on the top of the spray booth (1), the movable support (24) is fixedly connected with the sliding blocks (30), a plurality of paint spray guns (25) and air distribution boxes (26) are fixedly and penetratively arranged on the top of the movable support (24), the paint spray guns (25) and the air distribution boxes (26) are alternately arranged, a plurality of air exhaust holes (33) are arranged on the bottom of the air distribution box (26), the paint spray gun (25) is connected with an external paint pressure tank, and the air distribution box (26) is communicated with an external industrial hot air machine. A movable plate (19) is slidably arranged on the inner wall of the clamping box (8), two obliquely arranged drive plates (20) are fixedly arranged at the ends of the movable plate (19), one end of the drive plate (20) obliquely penetrates the positioning column (21) and is slidably connected with the positioning column (21), and an internally arranged telescopic cylinder (18) is fixedly arranged on the inner wall of the clamping box (8). The telescopic end of the internally arranged telescopic cylinder (18) is fixedly connected with the movable plate (19).

2. A vehicle axle drive shaft surface spraying apparatus according to claim 1, wherein: 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 with one of the clamping boxes (8), and the other end of the fixed U-shaped frame (6) and the movable U-shaped frame (5) is provided with a rotatably arranged rotating shaft (14), and the rotating shaft (14) is fixedly connected with the other clamping box (8).

3. A vehicle axle drive shaft surface spraying apparatus according to claim 2, wherein: The ends of the fixed U-shaped frame (6) and the movable U-shaped frame (5) are provided with a horizontally movably arranged connecting plate (12), a positioning shaft (13) is fixedly arranged on the upper end of the connecting plate (12), 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.

4. A vehicle axle drive shaft surface spraying apparatus according to claim 3, wherein: The inner walls of the fixed U-shaped frame (6) and the movable U-shaped frame (5) are fixedly provided with a plurality of drive telescopic cylinders (11), and the telescopic ends of the drive telescopic cylinders (11) are fixedly connected with the connecting plate (12).

5. The surface spraying device for an axle drive shaft as set forth in claim 1, wherein: The spraying chamber (1) is internally provided with a partition plate (22) fixedly arranged at the lower wall, and a plurality of electric control telescopic cylinders (23) are fixedly arranged at the top of the partition plate (22), and the telescopic ends of the electric control telescopic cylinders (23) are fixedly connected with the closing plate (3).

6. A vehicle axle shaft surface spraying device as claimed in claim 1, wherein: The opposite inner walls of the fixed U-shaped frame (6) and the movable U-shaped frame (5) are fixedly provided with lifting telescopic cylinders (10), and the telescopic ends of the lifting telescopic cylinders (10) are fixedly connected with the lifting plate (9).

7. The surface spraying device for an axle drive shaft of claim 1, wherein: The bottom of the supporting plate (4) is fixedly provided with a control telescopic cylinder (28), and the telescopic end of the control telescopic cylinder (28) is fixedly connected with the most edge movable U-shaped frame (5).

8. The surface spraying device for an axle drive shaft of claim 1, wherein: The spraying chamber (1) is internally provided with two lead screws (31) at the top, and the top of the spraying chamber (1) is fixedly provided with a fixed plate (32) at the positions of the two ends of the lead screw (31), the two ends of the lead screw (31) are rotationally connected with the two fixed plates (32) correspondingly, the lead screw (31) penetrates through the sliding block (30) and is threadedly connected with the sliding block (30), and the ends of the two fixed plates (32) are fixedly provided with servo motors (29), and the output shafts of the servo motors (29) are fixedly connected with the lead screw (31).

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