Electrophoretic paint spraying process and equipment for motor end cover

Abstract

The invention relates to the technical field of motor end cover machining, in particular to an electrophoretic paint spraying process and equipment for a motor end cover, and the process comprises the following steps: carrying out electrophoretic spraying on a blank to form a semi-finished product; and machining the semi-finished product on a machine to form the motor end cover. Painting is completed on the blank through electrophoretic spraying, then the motor end cover is formed through machining, paint cannot enter the hole, follow-up scraping is not needed, the assembly efficiency and the assembly precision of the motor end cover and a bearing or a rotating shaft are improved, and the machining efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of motor end cover processing, and particularly relates to an electrophoretic paint spraying process and equipment for motor end covers. Background Art

[0002] The motor end cover is an important part of the motor, mainly used to support bearings, protect the internal structure, and seal the motor. In order to extend the service life of the motor end cover and improve its aesthetic degree, manufacturers often spray paint on the outer surface of the motor end cover. The paint not only makes the motor end cover beautiful, but also provides anti-corrosion, anti-rust, insulation, and weather resistance protection.

[0003] However, when spraying paint, the paint will enter the holes on the motor end cover for installing the rotating shaft or bearing. The paint has a certain thickness, which may make it inconvenient to install the bearing and the rotating shaft. Therefore, before assembling the motor, users often use tools such as scrapers to scrape off the paint on the inner wall of the holes on the motor end cover, resulting in a reduction in processing efficiency. It is difficult to scrape the paint cleanly, which still affects the assembly of the motor, thereby reducing the qualified rate of the motor finished product and increasing the production cost. Summary of the Invention

[0004] In order to improve the processing efficiency, the present application provides an electrophoretic paint spraying process and equipment for motor end covers.

[0005] In a first aspect, the present application provides an electrophoretic paint spraying process for motor end covers, adopting the following technical solution: An electrophoretic paint spraying process for motor end covers includes the following steps: Electrophoretically spray the blank to form a semi-finished product; Machine-process the semi-finished product to form a motor end cover.

[0006] By adopting the above technical solution, the painting is completed on the blank through electrophoretic spraying, and then the motor end cover is formed by machining. The paint will not enter the holes, and there is no need for subsequent scraping, which improves the assembly efficiency and assembly accuracy of the motor end cover with the bearing or the rotating shaft, and improves the processing efficiency.

[0007] In a second aspect, the present application provides an electrophoretic paint spraying equipment for motor end covers, adopting the following technical solution: An electrophoretic paint spraying equipment for motor end covers includes a cleaning tank, an electrophoresis tank, a curing furnace, a conveying component, a lifting component, and a hanging rack. The electrophoresis tank is arranged between the cleaning tank and the curing furnace. The upper end of the cleaning tank is provided with a cleaning groove, the upper end of the electrophoresis tank is provided with an electrophoresis groove, the curing furnace is provided with a curing chamber, the conveying component is arranged directly above the cleaning groove and the electrophoresis groove, the conveying component penetrates through the curing chamber, the lifting component is fixedly connected to the conveying component, the hanging rack is fixedly connected to the lower end of the lifting component, and the hanging rack is used for hanging the blank.

[0008] By adopting the above technical solution, the conveying component drives the lifting component to move, and the lifting component moves the hanging rack up and down, thereby driving the blank into the cleaning tank and the electrophoresis tank in sequence to complete electrophoretic painting. Then, the paint is dried in the curing furnace to achieve automatic processing and improve the processing efficiency.

[0009] Preferably, the conveying component includes a column, a conveying rack, a moving block, a connecting column, and a roller. The lower end of the column is fixedly connected to the ground, and the upper end of the column is fixedly connected to the conveying rack. The conveying rack is arranged directly above the cleaning tank and the electrophoresis tank. The conveying rack penetrates through the curing chamber. The conveying rack is provided with a placement cavity. A slideway is provided at the lower end of the conveying rack. The slideway extends along the length direction of the conveying rack. The slideway communicates with the placement cavity. The moving block slides in the slideway. The outer wall of the connecting column is fixedly connected to the upper end of the moving block. The roller is coaxially rotatably connected to the end of the connecting column. The outer wall of the roller abuts against the bottom wall of the placement cavity. The lifting component is fixedly connected to the lower end of the moving block.

[0010] By adopting the above technical solution, the column supports the conveying rack. The movement of the moving block in the slideway drives the synchronous movement of the lifting component. The roller and the connecting column support the moving block, and at the same time reduce the friction force, facilitating the movement of the moving block and improving the processing efficiency.

[0011] Preferably, the conveying component further includes a driving member. The driving member includes a conveying chain, a support frame, and a first sprocket. An avoidance opening is provided at the upper end of the conveying rack. The avoidance opening communicates with the placement cavity. The avoidance opening extends along the length direction of the conveying rack. The conveying chain is fixedly connected to the upper end of the connecting column. The conveying chain penetrates through the avoidance opening. The support frame is fixedly connected to the ground. The first sprocket is rotatably connected to the conveying rack around its own axis. The rotation axis of the first sprocket is vertical. The first sprocket meshes with the conveying chain.

[0012] By adopting the above technical solution, the first sprocket controls the movement of the conveying chain while rotating. The movement of the conveying chain drives the synchronous movement of the connecting column at the same time, facilitating the control of the position of the moving block and facilitating the movement of the blank into the cleaning tank or the electrophoresis tank, improving the processing efficiency.

[0013] Preferably, it further includes an air-drying component, the air-drying component includes a connecting shaft, a second sprocket and an impeller, the conveying frame is provided with an air duct, there are two air ducts, and the two air ducts are respectively arranged on both sides of the placing cavity. The lower end of the conveying frame is provided with an exhaust port, the upper end of the conveying frame is provided with an air inlet, both the exhaust port and the air inlet communicate with the air duct, the connecting shaft is rotatably connected to the upper end of the conveying frame around its own axis, the axis of rotation of the connecting shaft is vertical, the connecting shaft penetrates the air duct, the second sprocket is coaxially and fixedly connected to the upper end of the connecting shaft, the second sprocket meshes with the conveying chain, and the impeller is coaxially and fixedly connected to the lower end of the connecting shaft, and the impeller is arranged in the exhaust port.

[0014] By adopting the above technical solution, while the conveying chain moves, it drives the second sprocket to rotate. The rotation of the impeller causes the air inlet to intake air and the exhaust port to exhaust air, and the gas is blown onto the surface of the blank, facilitating the air-drying of the blank.

[0015] Preferably, the moving block includes a moving column, a bearing, a rotating column and a gear. The upper end of the moving column is fixedly connected to the connecting column. The bearing is coaxially and fixedly connected to the outer wall of the moving column. The upper end of the rotating column is coaxially provided with a rotating groove, and the bearing is coaxially and fixedly connected to the groove wall of the rotating groove. The gear is coaxially and fixedly connected to the outer wall of the rotating column. The rack is fixedly connected to the inner wall of the slideway, and the gear meshes with the rack.

[0016] By adopting the above technical solution, while the moving column moves, due to the meshing of the gear and the rack, the rotating column rotates self, accelerating the shedding of water stains from the blank, facilitating drying. When the blank enters the curing furnace, it is convenient for uniform drying, improving the drying efficiency and production quality.

[0017] Preferably, the elastic member is arranged on the side of the rotating column away from the rack. One end of the elastic member is fixedly connected to the connecting column, and the other end of the elastic member abuts against the inner wall of the placing cavity.

[0018] By adopting the above technical solution, the elastic member keeps the gear and the rack in a meshing state, improving the stability of the rotation of the rotating column.

[0019] Preferably, the lifting component includes a protection cylinder, a driving cylinder and a lifting column. The protection cylinder is coaxially and fixedly connected to the lower end of the rotating column. The driving cylinder is arranged in the protection cylinder. The cylinder body of the driving cylinder is fixedly connected to the lower end of the rotating column. The piston rod of the driving cylinder is fixedly connected to the lifting column. The lifting column is slidably connected to the inner wall of the protection cylinder. The hanging rack includes a fixed rod and a hanging rod. The fixed rod is fixedly connected to the lower end of the lifting column. The hanging rod is fixedly connected to the outer wall of the fixed rod. The included angle between the hanging rod and the fixed rod is set as an acute angle, and the hanging rod is used for hanging the blank.

[0020] By adopting the above technical solution, the protective tube protects the driving cylinder, extending the service life of the driving cylinder. The driving cylinder controls the lifting column to slide up and down, thereby driving the hanging rack to slide up and down, making it easier to control the blank to enter the electrophoresis tank for electrophoresis.

[0021] Preferably, it also includes a first spring and a locking block, the outer wall of the protective tube is provided with a mounting groove, one end of the first spring is fixedly connected to the bottom of the mounting groove, the other end of the first spring is fixedly connected to one end of the locking block, the other end of the locking block is used to abut the hanging rod, and the locking block is slidably connected to the groove wall of the mounting groove.

[0022] By adopting the above technical solution, the centrifugal force generated when the protective cylinder rotates causes the locking block to slide against the elastic force of the first spring. The locking block abuts the hanging rod so that the blank cannot fall off the hanging rod, thereby improving the stability of the blank and facilitating processing.

[0023] Preferably, it also includes a hinged column, a locking plate and a torsion spring. The outer wall of the lifting column is provided with an avoidance groove. The hinged column is fixedly connected to the groove wall of the avoidance groove. The axis of the hinged column is horizontal. One end of the locking plate is hinged to the hinged column through a torsion spring. The other end of the locking plate is used to abut the hanging rod. The end of the locking plate facing away from the bottom of the avoidance groove is used for abutment by the protective tube.

[0024] By adopting the above technical solution, when the lifting column slides downward and the blank is immersed in water, the torsion spring causes the locking plate to move away from the avoidance groove until it abuts the hanging rod, reducing the probability of the blank falling off the hanging rod and improving the stability of the blank.

[0025] In summary, this application includes at least one of the following beneficial technical effects: The blank is painted by electrophoretic spraying and then machined to form the motor end cover. The paint will not enter the hole and no subsequent scraping is required, which improves the assembly efficiency and assembly accuracy of the motor end cover and the bearing or shaft, and improves the processing efficiency. The conveyor chain moves while driving the second sprocket to rotate. The rotation of the impeller causes air to enter the air inlet and exit the air outlet. The gas is blown to the surface of the blank, making it easier to air dry the blank. As the moving column moves, the gear and rack engage, causing the rotating column to rotate, accelerating the removal of water stains from the blank, making it easier to dry. When the blank enters the curing furnace, it is easier to dry evenly, thereby improving drying efficiency and production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a schematic diagram of the overall structure of an electrophoretic paint spraying device for a motor end cover.

[0027] Figure 2 It is a cross-sectional view of an electrophoretic paint spraying device for a motor end cover.

[0028] Figure 3 is Figure 2 The enlarged view of part A in

[0029] Figure 4 It is the cross-sectional view of the elastic part.

[0030] Explanation of reference numerals in the drawings: 1. Pretreatment assembly; 11. Scalding pool; 111. Scalding tank; 12. Degreasing pool; 121. Degreasing tank; 13. Cleaning pool; 131. Cleaning tank; 2. Electrophoresis assembly; 21. Oxidation pool; 211. Oxidation tank; 22. Electrophoresis tank; 221. Electrophoresis tank; 23. Water washing pool; 231. Water washing tank; 3. Curing assembly; 31. Curing furnace; 311. Curing chamber; 32. Electric heating rod; 4. Conveying assembly; 41. Column; 42. Conveying rack; 421. Placing cavity; 422. Slideway; 423. Avoidance opening; 424. Air duct; 425. Exhaust port; 426. Air inlet; 43. Moving block; 431. Moving column; 432. Bearing; 433. Rotating column; 4331. Rotating groove; 434. Gear; 435. Limiting plate; 44. Rack; 45. Connecting column; 46. Roller; 47. Elastic part; 471. Shell; 4711. Accommodating groove; 472. Compression spring; 473. Sphere; 48. Driving part; 481. Conveyor chain; 482. Support frame; 483. First sprocket; 5. Air drying assembly; 51. Connecting shaft; 52. Second sprocket; 53. Impeller; 6. Lifting assembly; 61. Protection cylinder; 611. Installation groove; 62. Driving cylinder; 63. Lifting column; 631. Avoidance groove; 7. Hanging rack; 71. Fixed rod; 72. Hanging rod; 8. Locking assembly; 81. First spring; 82. Locking block; 83. Hinge column; 84. Locking plate; 85. Torsion spring. Detailed implementation manners

[0031] The following is a further detailed description of the present application in conjunction with the attached Figures 1-4 drawings.

[0032] The embodiment of the present application discloses an electrophoretic paint spraying process and equipment for a motor end cover. The electrophoretic paint spraying process for the motor end cover includes the following steps: Electrophoretically spray the blank to form a semi-finished product; Machine-process the semi-finished product to form a motor end cover.

[0033] The implementation principle of the electrophoretic paint spraying process for a motor end cover in the embodiment of the present application is as follows: The paint is applied to the blank through electrophoretic spraying, and then the motor end cover is formed by machining. The paint will not enter the holes, and there is no need for subsequent scraping, which improves the assembly efficiency and assembly accuracy of the motor end cover with the bearing or the rotating shaft, and improves the processing efficiency. The embodiment of the present application also discloses an electrophoretic paint spraying device for a motor end cover. Refer to Figure 1 and Figure 2, The electrophoretic paint spraying equipment for the motor end cover includes a pretreatment component 1, an electrophoresis component 2, a curing component 3, a conveying component 4, an air-drying component 5, a lifting component 6, a hanging rack 7, and a locking component 8.

[0034] Referring to Figure 1 , the pretreatment component 1 includes a scalding pool 11, a degreasing pool 12, and a cleaning pool 13. The electrophoresis component 2 includes an oxidation pool 21, an electrophoresis pool 22, and a water washing pool 23. The scalding pool 11, the degreasing pool 12, the cleaning pool 13, the oxidation pool 21, the electrophoresis pool 22, and the water washing pool 23 are connected in sequence. At the upper end of the scalding pool 11, there is a scalding tank 111 for cleaning the stains on the surface of the blank. At the upper end of the degreasing pool 12, there is a degreasing tank 121 for thoroughly cleaning the stains on the surface of the blank with degreasing liquid. At the upper end of the cleaning pool 13, there is a cleaning tank 131 for cleaning the degreasing liquid. At the upper end of the oxidation pool 21, there is an oxidation tank 211 for forming an oxide film on the surface of the blank. At the upper end of the electrophoresis pool 22, there is an electrophoresis tank 221 for forming electrophoretic paint on the surface of the blank. At the upper end of the water washing pool 23, there is a water washing tank 231 for cleaning the floating paint.

[0035] The curing component 3 includes a curing furnace 31 and electric heating rods 32. The curing furnace 31 is provided with a curing chamber 311, and the curing chamber 311 penetrates through the curing furnace 31 along the length direction of the curing furnace 31. The electric heating rods 32 are fixedly connected to the inner wall of the curing chamber 311.

[0036] Referring to Figure 1 and Figure 3 , the conveying component 4 includes columns 41, a conveying rack 42, moving blocks 43, racks 44, connecting columns 45, rollers 46, elastic members 47, and driving members 48. The lower ends of the columns 41 are fixedly connected to the ground, and the upper ends of the columns 41 are fixedly connected to the lower end of the conveying rack 42. There are multiple columns 41, and the multiple columns 41 are arranged at intervals along the extending direction of the conveying rack 42. The conveying rack 42 is arranged directly above the scalding pool 11, the degreasing pool 12, the cleaning pool 13, the oxidation pool 21, the electrophoresis pool 22, and the water washing pool 23. The conveying rack 42 penetrates through the curing chamber 311. There are multiple electric heating rods 32, and the multiple electric heating rods 32 are evenly distributed on both sides of the conveying rack 42.

[0037] Referring to Figure 3 , the conveying rack 42 is provided with a placement cavity 421. At the lower end of the conveying rack 42, there is a slideway 422 that extends along the length direction of the conveying rack 42. At the upper end of the conveying rack 42, there is an avoidance opening 423 that extends along the length direction of the conveying rack 42. Both the slideway 422 and the avoidance opening 423 communicate with the placement cavity 421, and the avoidance opening 423 is arranged directly above the slideway 422.

[0038] The moving block 43 slides within the slideway 422. The moving block 43 includes a moving column 431, a bearing 432, a rotating column 433, a gear 434, and a limiting plate 435. The bearing 432 is coaxially and fixedly connected to the outer wall of the moving column 431. The upper end of the rotating column 433 is coaxially provided with a rotating groove 4331. The bearing 432 is coaxially and fixedly connected to the groove wall of the rotating groove 4331. The gear 434 is coaxially and fixedly connected to the outer wall of the rotating column 433. The rack 44 is fixedly connected to the inner wall of the slideway 422 facing the inner circumference of the conveying frame 42. The gear 434 meshes with the rack 44. The limiting plate 435 is coaxially and fixedly connected to the outer wall of the rotating column 433. The limiting plate 435 is disposed above the gear 434. The diameter of the limiting plate 435 is greater than the width of the slideway 422.

[0039] Referring to Figure 3 and Figure 4 , the outer wall of the connecting column 45 is fixedly connected to the upper end of the rotating column 433. There are two rollers 46. The two rollers 46 are respectively coaxially rotatably connected to both ends of the connecting column 45 through bearings. The outer wall of the roller 46 abuts against the bottom wall of the placement cavity 421. The elastic member 47 is disposed on the side of the rotating column 433 away from the rack 44. The elastic member 47 includes a housing 471, a compression spring 472, and a sphere 473. The housing 471 is fixedly connected to the end of the connecting column 45 facing away from the rack 44. The end of the housing 471 facing away from the connecting column 45 is provided with a receiving groove 4711. One end of the compression spring 472 is fixedly connected to the bottom of the receiving groove 4711. The other end of the compression spring 472 abuts against one end of the sphere 473. The other end of the sphere 473 abuts against the inner wall of the placement cavity 421. The diameter of the sphere 473 is greater than the diameter of the notch of the receiving groove 4711, such that the sphere 473 cannot fall off the housing 471.

[0040] Referring to Figure 1 and Figure 3 , the driving member 48 includes a conveying chain 481, a support frame 482, and a first sprocket 483. The conveying chain 481 is fixedly connected to the upper end of the connecting column 45. The conveying chain 481 passes through the avoidance opening 423. The support frame 482 is disposed on the inner circumference of the conveying frame 42. The support frame 482 is fixedly connected to the ground. The first sprocket 483 is rotatably connected to the conveying frame 42 about its own axis. The rotation axis of the first sprocket 483 is vertical. The first sprocket 483 meshes with the conveying chain 481. The driving motor drives the first sprocket 483 to rotate.

[0041] Referring to Figure 1 and Figure 3, the air-drying component 5 includes a connecting shaft 51, a second sprocket 52 and an impeller 53. The conveying frame 42 is provided with air ducts 424. There are two air ducts 424, which are respectively arranged on both sides of the placement cavity 421. The lower end of the conveying frame 42 is provided with exhaust ports 425, and the exhaust ports 425 face the blank. There are multiple exhaust ports 425, which are respectively arranged on both sides of the placement cavity 421. The multiple exhaust ports 425 are evenly spaced along the length direction of the conveying frame 42. The upper end of the conveying frame 42 is provided with air inlets 426. The multiple air inlets 426 are respectively arranged on both sides of the placement cavity 421. The multiple air inlets 426 are evenly spaced along the length direction of the conveying frame 42. Both the exhaust ports 425 and the air inlets 426 communicate with the air ducts 424.

[0042] The connecting shaft 51 is rotatably connected to the upper end of the conveying frame 42 around its own axis. The rotation axis of the connecting shaft 51 is vertical. The connecting shaft 51 penetrates through the air duct 424. There are multiple connecting shafts 51, and the connecting shafts 51 are arranged in one-to-one correspondence with the exhaust ports 425. The second sprocket 52 is coaxially and fixedly connected to the upper end of the connecting shaft 51. The second sprocket 52 meshes with the conveying chain 481. The impeller 53 is coaxially and fixedly connected to the lower end of the connecting shaft 51. The impeller 53 is arranged in the exhaust port 425. The air inlets 426 are arranged on both sides of the second sprocket 52. There is one air inlet 426 between adjacent second sprockets 52.

[0043] Referring to Figure 3 , the lifting component 6 includes a protection cylinder 61, a driving cylinder 62 and a lifting column 63. The protection cylinder 61 is coaxially and fixedly connected to the lower end of the rotating column 433. The driving cylinder 62 is arranged in the protection cylinder 61. The cylinder body of the driving cylinder 62 is fixedly connected to the lower end of the rotating column 433. The piston rod of the driving cylinder 62 is fixedly connected to the lifting column 63. The lifting column 63 is slidably connected to the inner wall of the protection cylinder 61. The hanging rack 7 includes a fixing rod 71 and a hanging rod 72. The fixing rod 71 is fixedly connected to the lower end of the lifting column 63. The hanging rod 72 is fixedly connected to the outer wall of the fixing rod 71. The included angle between the hanging rod 72 and the fixing rod 71 is set as an acute angle. The hanging rod 72 is used for hanging the blank.

[0044] The locking component 8 includes a first spring 81, a locking block 82, a hinge column 83, a locking plate 84 and a torsion spring 85. An installation groove 611 is provided on the outer wall of the protection cylinder 61. One end of the first spring 81 is fixedly connected to the bottom of the installation groove 611. The other end of the first spring 81 is fixedly connected to one end of the locking block 82. The other end of the locking block 82 is used to abut against the hanging rod 72. The locking block 82 is slidably connected to the groove wall of the installation groove 611. An avoidance groove 631 is provided on the outer wall of the lifting column 63. The hinge column 83 is fixedly connected to the groove wall of the avoidance groove 631. The axis of the hinge column 83 is horizontal. One end of the locking plate 84 is hinged to the hinge column 83 through the torsion spring 85. The other end of the locking plate 84 is used to abut against the hanging rod 72. The end of the locking plate 84 away from the bottom of the avoidance groove 631 is used for the protection cylinder 61 to abut against.

[0045] The implementation principle of the electrophoretic paint spraying equipment for a motor end cover in an embodiment of the present application is as follows: The blank is hung on the hanger 7. While the conveying component 4 drives the hanger 7 to move, the hanger 7 rotates. The air drying component 5 blows air on the blank, and the locking component 8 locks the blank. When the blank needs to be immersed in water, the lifting component 6 moves the blank downward, and the locking plate 84 locks the blank so that the blank cannot fall off the hanger 7.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An electrophoretic paint spraying process for a motor end cover, characterized in that: Including the following steps: Electrophoretically coating the blank to form a semi-finished product; Machining the semi-finished product on a machine to form a motor end cover.

2. An electrophoretic paint spraying device for a motor end cover, applied to the electrophoretic paint spraying process for a motor end cover described in claim 1, characterized in that: It includes a cleaning tank (13), an electrophoresis tank (22), a curing furnace (31), a conveying assembly (4), a lifting assembly (6) and a hanging rack (7). The electrophoresis tank (22) is arranged between the cleaning tank (13) and the curing furnace (31). The upper end of the cleaning tank (13) is provided with a cleaning trough (131), the upper end of the electrophoresis tank (22) is provided with an electrophoresis trough (221), the curing furnace (31) is provided with a curing chamber (311), the conveying assembly (4) is arranged directly above the cleaning trough (131) and the electrophoresis trough (221), the conveying assembly (4) penetrates through the curing chamber (311), the lifting assembly (6) is fixedly connected to the conveying assembly (4), the hanging rack (7) is fixedly connected to the lower end of the lifting assembly (6), and the hanging rack (7) is used for hanging the blank.

3. The electrophoretic paint spraying equipment for the motor end cover according to claim 2, characterized in that: The conveying assembly (4) includes a column (41), a conveying rack (42), a moving block (43), a connecting column (45) and a roller (46). The lower end of the column (41) is fixedly connected to the ground, the upper end of the column (41) is fixedly connected to the conveying rack (42). The conveying rack (42) is arranged directly above the cleaning trough (131) and the electrophoresis trough (221), the conveying rack (42) penetrates through the curing chamber (311), the conveying rack (42) is provided with a placement cavity (421), the lower end of the conveying rack (42) is provided with a slideway (422), the slideway (422) extends along the length direction of the conveying rack (42), the slideway (422) communicates with the placement cavity (421), the moving block (43) slides in the slideway (422), the outer wall of the connecting column (45) is fixedly connected to the upper end of the moving block (43), the roller (46) is coaxially rotatably connected to the end of the connecting column (45), the outer wall of the roller (46) abuts against the bottom wall of the placement cavity (421), and the lifting assembly (6) is fixedly connected to the lower end of the moving block (43).

4. The electrophoretic paint spraying device for the motor end cover according to claim 3, characterized in that: The conveying assembly (4) further includes a driving member (48). The driving member (48) includes a conveying chain (481), a support frame (482) and a first sprocket (483). The upper end of the conveying rack (42) is provided with an avoidance opening (423), the avoidance opening (423) communicates with the placement cavity (421), the avoidance opening (423) extends along the length direction of the conveying rack (42), the conveying chain (481) is fixedly connected to the upper end of the connecting column (45), the conveying chain (481) penetrates through the avoidance opening (423), the support frame (482) is fixedly connected to the ground, the first sprocket (483) is rotatably connected to the conveying rack (42) around its own axis, the rotation axis of the first sprocket (483) is vertical, and the first sprocket (483) meshes with the conveying chain (481).

5. The electrophoretic paint spraying device for the motor end cover according to claim 4, wherein: It further includes an air drying component (5). The air drying component (5) includes a connecting shaft (51), a second sprocket (52) and an impeller (53). The conveying frame (42) is provided with air channels (424). There are two air channels (424), and the two air channels (424) are respectively arranged on both sides of the placement cavity (421). The lower end of the conveying frame (42) is provided with an exhaust port (425), and the upper end of the conveying frame (42) is provided with an air inlet (426). The exhaust port (425) and the air inlet (426) are both communicated with the air channel (424). The connecting shaft (51) is rotatably connected to the upper end of the conveying frame (42) around its own axis. The rotation axis of the connecting shaft (51) is vertical. The connecting shaft (51) penetrates through the air channel (424). The second sprocket (52) is coaxially and fixedly connected to the upper end of the connecting shaft (51). The second sprocket (52) meshes with the conveying chain (481). The impeller (53) is coaxially and fixedly connected to the lower end of the connecting shaft (51). The impeller (53) is arranged in the exhaust port (425).

6. The electrophoretic paint spraying equipment for the motor end cover according to claim 3, wherein: The conveying component (4) further includes a rack (44). The moving block (43) includes a moving column (431), a bearing (432), a rotating column (433) and a gear (434). The upper end of the moving column (431) is fixedly connected to the connecting column (45). The bearing (432) is coaxially and fixedly connected to the outer wall of the moving column (431). The upper end of the rotating column (433) is coaxially provided with a rotating groove (4331). The bearing (432) is coaxially and fixedly connected to the groove wall of the rotating groove (4331). The gear (434) is coaxially and fixedly connected to the outer wall of the rotating column (433). The rack (44) is fixedly connected to the inner wall of the slideway (422). The gear (434) meshes with the rack (44).

7. The electrophoretic paint spraying equipment for the motor end cover according to claim 6, characterized in that: The conveying component (4) further includes an elastic member (47). The elastic member (47) is arranged on the side of the rotating column (433) away from the rack (44). One end of the elastic member (47) is fixedly connected to the connecting column (45), and the other end of the elastic member (47) abuts against the inner wall of the placement cavity (421).

8. The electrophoretic paint spraying equipment for the motor end cover according to claim 6, characterized in that: The lifting component (6) includes a protection cylinder (61), a driving cylinder (62) and a lifting column (63). The protection cylinder (61) is coaxially and fixedly connected to the lower end of the rotating column (433). The driving cylinder (62) is arranged in the protection cylinder (61). The cylinder body of the driving cylinder (62) is fixedly connected to the lower end of the rotating column (433). The piston rod of the driving cylinder (62) is fixedly connected to the lifting column (63). The lifting column (63) is slidably connected to the inner wall of the protection cylinder (61). The hanging rack (7) includes a fixing rod (71) and a hanging rod (72). The fixing rod (71) is fixedly connected to the lower end of the lifting column (63). The hanging rod (72) is fixedly connected to the outer wall of the fixing rod (71). The included angle between the hanging rod (72) and the fixing rod (71) is set as an acute angle. The hanging rod (72) is used for hanging the end cover.

9. The electrophoretic paint spraying equipment for the motor end cover according to claim 8, characterized in that: The protective tube (61) further comprises a first spring (81) and a locking block (82); the outer wall of the protective tube (61) is provided with a mounting groove (611); one end of the first spring (81) is fixedly connected to the bottom of the mounting groove (611); the other end of the first spring (81) is fixedly connected to one end of the locking block (82); the other end of the locking block (82) is used to abut against the hanging rod (72); and the locking block (82) is slidably connected to the groove wall of the mounting groove (611).

10. The electrophoretic paint spraying equipment for the motor end cover according to claim 8, characterized in that: It also includes a hinge column (83), a locking plate (84) and a torsion spring (85), the outer wall of the lifting column (63) is provided with an avoidance groove (631), the hinge column (83) is fixedly connected to the groove wall of the avoidance groove (631), the axis of the hinge column (83) is horizontal, one end of the locking plate (84) is hinged to the hinge column (83) through the torsion spring (85), the other end of the locking plate (84) is used to abut the hanging rod (72), and the end of the locking plate (84) away from the groove bottom of the avoidance groove (631) is used for abutment by the protective tube (61).

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