Equipment for applying paint on the surface of mechanical parts

Abstract

The utility model discloses a paint coating device for the surface of mechanical parts, and relates to the technical field of mechanical parts processing, comprising a shell; opposite ends of the outer wall of the shell are open; the utility model drives a reciprocating rod to rotate through a motor, so that the reciprocating rod drives a first roller and a second roller to rotate through a first sprocket and a transmission member, and the mechanical parts are placed on the first roller and the second roller, so that the rotation of the first roller and the second roller drives the mechanical parts to move, and the rotation of the reciprocating rod also causes a moving block to reciprocate, so that the moving block drives a coating device to move back and forth through a guide rod, so that the mechanical parts are painted by the back and forth movement of the coating device during movement, because no manual operation is required during the painting process, so that the staff does not need to contact the paint, thereby ensuring the health of the staff, and the device is located inside the shell when painting the mechanical parts, thereby reducing the pollution of the paint to the air.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical parts processing, in particular to a device for applying paint on the surface of mechanical parts. Background Art

[0002] In order to prevent mechanical parts from being easily oxidized and corroded during use, the surface of mechanical parts needs to be sprayed with paint during the production and processing process, so that the paint layer on the outer surface of the mechanical parts can serve as a protective barrier, thereby increasing the service life of the mechanical parts.

[0003] When mechanical parts are painted on the surface in the prior art, spraying equipment is mostly used to spray paint on the outer surface of the mechanical parts. Since the spraying equipment sprays everywhere during use, part of the paint will be sprayed into the air, and the paint sprayed into the air will not only pollute the environment but also affect the health of the workers.

[0004] In view of the above technical problems, this application proposes a solution. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that in the prior art, when mechanical parts are subjected to surface paint treatment, most of the time, spraying equipment is used to spray paint on the outer surface of the mechanical parts. Since the spraying equipment sprays everywhere during use, part of the paint will be sprayed into the air, and the paint sprayed into the air will not only pollute the environment but also affect the health of the workers. A mechanical parts surface paint coating device is proposed.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A paint coating device for the surface of mechanical parts, comprising a shell; the opposite ends of the outer wall of the shell are open; a motor is fixedly connected to one side of the outer wall of the shell through a fixed block; a reciprocating rod is provided at the output end of the motor, and one end of the outer wall of the reciprocating rod penetrates one side of the outer wall of the shell and is rotatably connected to one side of the inner wall of the shell; a moving block is provided on the outer side wall of the reciprocating rod; a first roller is rotatably connected to one side of the inner wall of the shell, and one end of the outer wall of the first roller penetrates the shell; a group of second rollers is rotatably connected to one side of the inner wall of the shell, and one end of the outer wall of the group of second rollers penetrates the shell, and the first roller and the group of second rollers are distributed in a straight line; a transmission member is provided on the outer side wall of one end of the reciprocating rod that does not penetrate the shell through the first sprocket, and the first roller and the second roller are both rotated by the transmission member; the transmission member includes a second sprocket; a limit plate is fixedly connected to one side of the inner wall of the shell, and the bottom end of the outer wall of the limit plate is in contact with the top end of the outer wall of the moving block; a coating device is provided at the bottom end of the outer wall of the moving block through a guide rod.

[0008] Preferably, the inner wall of the first sprocket is fixedly connected to the outer wall of the reciprocating rod; one end of the outer wall of the second sprocket is fixedly connected to one end of the outer wall of the first roller, and the first sprocket and the second sprocket are connected by a chain; the outer wall of the first roller and one end of the outer wall of a group of second rollers are fixedly connected to a first gear; one side of the outer wall of the shell is rotatably connected to a group of second gears through a group of first round rods, and the group of second gears are staggered with the group of first gears; the group of second gears and the group of first gears are meshed with each other.

[0009] Preferably, the smearing device includes a smearing block and a smearing roller; a pair of first through grooves are opened at the bottom end of the outer wall of the smearing block, and the first through grooves are arc-shaped; a storage groove is opened at the top end of the inner wall of the first through groove, and the storage groove is connected with the first through groove; the two ends of the outer walls of a pair of smearing rollers are rotatably connected to the opposite sides of the inner walls of a pair of first through grooves; a storage shell is fixedly connected to one side of the outer wall of the moving block, and the storage shell and the storage slot are connected by a connecting pipe; a square through groove is opened at the top end of the outer wall of the shell, and the square through groove is located above the moving block; a cover plate is hinged on one side of the inner wall of the square through groove.

[0010] Preferably, the bottom end of the outer wall of the guide rod is fixedly connected to the top end of the outer wall of the smear block, and the top end of the outer wall of the guide rod passes through the moving block, and the guide rod is slidably connected to the moving block; the top end of the outer wall of the moving block is threadedly connected to a threaded rod, and the bottom end of the outer wall of the threaded rod passes through the moving block; the bottom end of the outer wall of the threaded rod is rotatably connected to a circular block; the bottom end of the outer wall of the circular block is fixedly connected to a spring, and the bottom end of the outer wall of the spring is fixedly connected to the top end of the outer wall of the smear block; a slope is provided at one side corner of the outer wall of the smear block.

[0011] Preferably, a collecting shell is slidably placed on the bottom end of the inner wall of the shell; a pull rod is fixedly connected to one side of the outer wall of the collecting shell; and the collecting shell is located below the smearing device.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. By rotating the threaded rod, the rotation of the threaded rod can make the threaded rod move up and down, so that the up and down movement of the threaded rod drives the circular block and the spring to move up and down, so that the smear block can move up and down, so that the device can adjust the height of the smear block according to the height of the mechanical parts, so that the practicality of the device is further improved.

[0014] 2. A collecting shell is slidably placed at the bottom end of the inner wall of the shell, so that when the smear block and the smear roller are idle, the paint may fall from the outer surface of the smear roller. Since the collecting shell is located below the smearing device, the collecting shell can collect the paint that falls from the smear roller, so that the paint will not be wasted. In addition, a pull rod is fixedly connected to one side of the outer wall of the collecting shell, so that the staff can easily place and take the collecting shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the partial structure of the main body of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the reciprocating rod, the moving block, the smearing device and the collecting shell of the utility model;

[0019] Figure 4 It is a cross-sectional structural schematic diagram of the moving block, the smearing device and the storage shell of the utility model;

[0020] Figure 5 An exploded bottom view of the coating block and coating roller of the utility model;

[0021] In the figure: 1. shell; 2. motor; 3. reciprocating rod; 4. moving block; 5. first roller; 6. second roller; 7. first sprocket; 8. second sprocket; 9. limit plate; 10. guide rod; 11. smearing device; 12. chain; 13. first gear; 14. second gear; 111. smearing block; 112. smearing roller; 15. first through groove; 16. storage groove; 17. storage shell; 18. connecting pipe; 19. threaded rod; 20. round block; 21. spring; 22. collecting shell; 23. pull rod; 24. square through groove; 25. cover plate. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 5As shown, a paint coating device for the surface of mechanical parts comprises a shell 1; the opposite ends of the outer wall of the shell 1 are open; a motor 2 is fixedly connected to one side of the outer wall of the shell 1 through a fixed block; a reciprocating rod 3 is provided at the output end of the motor 2, and one end of the outer wall of the reciprocating rod 3 passes through one side of the outer wall of the shell 1 and is rotatably connected to one side of the inner wall of the shell 1; a moving block 4 is provided on the outer side wall of the reciprocating rod 3; a first roller 5 is rotatably connected to one side of the inner wall of the shell 1, and one end of the outer wall of the first roller 5 passes through the shell 1; a group of second rollers 6 are rotatably connected to one side of the inner wall of the shell 1, and one end of the outer wall of the group of second rollers 6 passes through the shell 1, and the first roller 5 and the group of second rollers 6 are distributed in a straight line; the outer side wall of the end of the reciprocating rod 3 that does not pass through the shell 1 is connected to the outer side wall through a first chain The wheel 7 is provided with a transmission member, and the first roller 5 and the second roller 6 are both rotated by the transmission member; the transmission member includes a second sprocket 8; a limit plate 9 is fixedly connected to one side of the inner wall of the shell 1, and the bottom end of the outer wall of the limit plate 9 is in contact with the top end of the outer wall of the moving block 4; the bottom end of the outer wall of the moving block 4 is provided with a smearing device 11 through a guide rod 10, and the reciprocating rod 3 is a prior art and is not described. By placing mechanical parts on the first roller 5 and the second roller 6; the reciprocating rod 3 is driven to rotate by the motor 2, so that the reciprocating rod 3 drives the first sprocket 7 to rotate, thereby driving the first roller 5 and the second roller 6 to rotate through the transmission member, so that the rotation of the first roller 5 and the second roller 6 drives the mechanical parts placed on the first roller 5 and the second roller 6 to move, and when the reciprocating rod 3 rotates When the paint is applied to the paint brush 11, the outer wall of the reciprocating rod 3 is provided with a moving block 4, so that the rotation of the reciprocating rod 3 causes the moving block 4 to move back and forth, and the back and forth movement of the moving block 4 drives the coating device 11 to move back and forth through the guide rod 10, so that when the mechanical part moves to the coating device 11 under the rotation of the first roller 5 and the second roller 6, the back and forth movement of the coating device 11 will coat the outer surface of the mechanical part with paint, and when the mechanical part moves slowly, the top of the entire outer surface of the mechanical part will be coated with paint by the coating device 11. Because the device only needs to manually place the mechanical part when applying paint to the mechanical part, and no manual operation is required during the painting process, which makes the device not only more convenient, but also saves the staff from touching the paint. The health of the staff is guaranteed. When the mechanical parts are painted by the device, they are located inside the shell 1, thereby reducing the contact range between the paint and the air, thereby reducing the pollution of the paint to the air. The coating device 11 includes a coating block 111 and a coating roller 112. A pair of first through grooves 15 are provided at the bottom end of the outer wall of the coating block 111, and the first through grooves 15 are arc-shaped. A storage groove 16 is provided at the top end of the inner wall of the first through groove 15, and the storage groove 16 is connected to the first through groove 15. The two ends of the outer walls of a pair of coating rollers 112 are rotatably connected to the opposite sides of the inner walls of the pair of first through grooves 15 respectively. A storage shell 17 is fixedly connected to one side of the outer wall of the moving block 4, and the storage shell 17 and the storage slot 16 are connected through a connecting pipe 18.A square through slot 24 is provided at the top of the outer wall of the shell 1, and the square through slot 24 is located above the moving block 4; a cover plate 25 is hingedly connected to one side of the inner wall of the square through slot 24. The coating device 11 includes a coating block 111 and a coating roller 112. When the coating device 11 is coating paint, the reciprocating rod 3 drives the moving block 4 to move back and forth, and the moving block 4 drives the coating block 111 to move back and forth through the guide rod 10. When the coating roller 112 under the coating block 111 contacts the mechanical parts, the back and forth movement of the coating block 111 causes the coating roller 112 to roll on the outer surface of the mechanical parts, so that the coating roller 112 applies the paint to the outer surface of the mechanical parts, and a storage shell 17 is fixedly connected to one side of the outer wall of the moving block 4, so that the staff The paint can be filled into the storage shell 17. Since the storage shell 17 and the storage slot 16 on the smearing block 111 are connected through the connecting pipe 18, the paint in the storage shell 17 will enter the storage slot 16 through the connecting pipe 18, so that the paint will adhere to the outer surface of the smearing roller 112. The rotation of the smearing roller 112 can smear the paint on the outer surface of the mechanical parts. A square through groove 24 is opened at the top of the outer wall of the shell 1, and the square through groove 24 is located above the moving block 4; a cover plate 25 is hinged on one side of the inner wall of the square through groove 24, so that when the staff replenishes the paint, they only need to open the cover plate 25, so that the device is not only more convenient for painting the mechanical parts, but also the staff only needs to replenish the oil once every period of time. The paint can make the device work continuously, so that the device reduces the workload of the staff, and it is also convenient to add paint, and the inner side wall of the first sprocket 7 is fixed to the outer side wall of the reciprocating rod 3; one end of the outer wall of the second sprocket 8 is fixed to one end of the outer wall of the first roller 5, and the first sprocket 7 and the second sprocket 8 are connected by a chain 12; the outer side wall of the first roller 5 and one end of the outer wall of a group of second rollers 6 are fixedly connected with a first gear 13; one side of the outer wall of the shell 1 is rotatably connected with a group of second gears 14 through a group of first round rods, and a group of second gears 14 are staggered with a group of first gears 13; a group of second gears 14 and a group of first gears 13 are meshed with each other; the reciprocating rod 3 is driven to rotate by the motor 2, so the first The inner side wall of a sprocket 7 is fixedly connected to the outer side wall of the reciprocating rod 3, so that the rotation of the reciprocating rod 3 drives the first sprocket 7 to rotate, and the first sprocket 7 and the second sprocket 8 are connected by a chain 12, and one end of the outer wall of the second sprocket 8 is fixedly connected to one end of the outer wall of the first roller 5, so that the rotation of the first sprocket 7 drives the second sprocket 8 to rotate through the chain 12, so that the rotation of the second sprocket 8 drives the first roller 5 to rotate, because the outer side wall of the first roller 5 and one end of the outer wall of a group of second rollers 6 are fixedly connected with the first gear 13, so that the rotation of the first roller 5 drives the first gear 13 on the first roller 5 to rotate, because a group of second gears 14 and a group of first gears 13 are staggered respectively; a group of second gears 14 and a group of first gears 13 are meshed with each other;The rotation of the first gear 13 on the first roller 5 will drive a group of second gears 14 and a group of first gears 13 to rotate, and the group of second gears 14 and the group of first gears 13 are staggered to make the group of first gears 13 have the same rotation direction, so that the group of second rollers 6 and the first roller 5 have the same rotation direction, so that the rotation of the motor 2 can make the first roller 5 and the group of second rollers 6 rotate, so that the rotation force of the first roller 5 and the group of second rollers 6 drives the mechanical parts placed thereon to move, so that the mechanical parts can automatically move to the coating device 11 to be coated with paint, and after the paint is coated, they will continue to move until they are moved out of the shell 1, so that the device is more convenient to coat the mechanical parts with paint, and the device coats the mechanical parts with paint in an assembly line manner, so that the device can coat the mechanical parts with paint in batches, so that the device has a higher efficiency when coating a large number of mechanical parts with paint, and a collection shell 22 is slidably placed at the bottom end of the inner wall of the shell 1; A pull rod 23 is fixedly connected to one side of the outer wall of the shell 22; the collecting shell 22 is located below the coating device 11, and the collecting shell 22 is slidably placed on the bottom end of the inner wall of the shell 1, so that when the coating block 111 and the coating roller 112 are idle, the paint may fall from the outer surface of the coating roller 112. Because the collecting shell 22 is located below the coating device 11, the collecting shell 22 can collect the paint falling from the coating roller 112, so that the paint will not be wasted, and the pull rod 23 is fixedly connected to one side of the outer wall of the collecting shell 22, so that the staff can conveniently place and Take the collecting shell 22, and fix the outer wall bottom end of the guide rod 10 to the outer wall top end of the smearing block 111, and the outer wall top end of the guide rod 10 passes through the moving block 4, and the guide rod 10 is slidably connected to the moving block 4; the outer wall top end of the moving block 4 is threadedly connected with the threaded rod 19, and the outer wall bottom end of the threaded rod 19 passes through the moving block 4; the outer wall bottom end of the threaded rod 19 is rotatably connected with the circular block 20; the outer wall bottom end of the circular block 20 is fixedly connected with the spring 21, and the outer wall bottom end of the spring 21 is fixedly connected to the outer wall top end of the smearing block 111;An inclined surface is provided at one corner of the outer wall of the smear block 111. By rotating the threaded rod 19, since the threaded rod 19 is threadedly connected to the moving block 4, the rotation of the threaded rod 19 allows the threaded rod 19 to move up and down, so that the up and down movement of the threaded rod 19 drives the circular block 20 and the spring 21 to move up and down, so that the smear block 111 can move up and down, so that the device can adjust the height of the smear block 111 according to the height of the mechanical parts, so that the practicality of the device is further improved, and the smear block 111 is connected to the circular block 20 through the spring 21, so that when the smear block 111 encounters mechanical parts with different concave and convex parts, the mechanical parts with different concave and convex parts will contact the inclined surface of the smear block 111 when encountering the smear block 111, so that The concave and convex mechanical parts continue to move, causing the smear block 111 to move up, and the spring 21 contracts, so that the smear block 111 will not block the concave and convex mechanical parts when applying paint to the concave and convex mechanical parts, and the spring 21 will bounce the smear block 111 on the concave mechanical parts. The outer surface of the mechanical parts at the convex part will cause the smear block 111 to move up and apply paint, and the outer surface of the mechanical parts at the concave part will cause the smear block 111 to apply paint to the concave mechanical parts, so that when the device is applied to the concave and convex mechanical parts, not only will the concave and convex mechanical parts not be blocked, but the outer surfaces of the concave and convex mechanical parts will also be painted. ;

[0024] Working principle: mechanical parts are placed on the first roller 5 and the second roller 6; the reciprocating rod 3 is driven to rotate by the motor 2, and since the inner wall of the first sprocket 7 is fixedly connected to the outer wall of the reciprocating rod 3, the rotation of the reciprocating rod 3 drives the first sprocket 7 to rotate, and the first sprocket 7 and the second sprocket 8 are connected by a chain 12, and one end of the outer wall of the second sprocket 8 is fixedly connected to one end of the outer wall of the first roller 5, so that the rotation of the first sprocket 7 drives the second sprocket 8 to rotate through the chain 12, so that the rotation of the second sprocket 8 drives the first roller 5 to rotate, and since the outer wall of the first roller 5 and one end of the outer wall of a group of second rollers 6 are fixedly connected with the first gear 13, the rotation of the first roller 5 drives the first gear 13 on the first roller 5 to rotate, and since a group of second gears 14 and a group of first gears 13 are staggered respectively; a group of second gears 14 and a group of first gears 13 are meshed with each other;The rotation of the first gear 13 on the first roller 5 will drive a group of second gears 14 and a group of first gears 13 to rotate, and the group of second gears 14 and the group of first gears 13 are staggered to make the group of first gears 13 rotate in the same direction, so that the rotation directions of the group of second rollers 6 and the first roller 5 are consistent, so that the rotation of the motor 2 can make the first roller 5 and the group of second rollers 6 rotate, so that the rotation force of the first roller 5 and the group of second rollers 6 drives the mechanical parts placed thereon to move, and when the reciprocating rod 3 rotates, the outer wall of the reciprocating rod 3 is provided with a moving block 4, so that the rotation of the reciprocating rod 3 causes the moving block 4 to rotate. The movable block 4 moves back and forth left and right, so that the back and forth movement of the movable block 4 drives the coating device 11 to move back and forth through the guide rod 10, so that when the mechanical part moves to the coating device 11 under the rotation of the first roller 5 and the second roller 6, the back and forth movement of the coating device 11 will coat the outer surface of the mechanical part with paint, and when the mechanical part moves slowly, the top of the entire outer surface of the mechanical part will be coated with paint by the coating device 11. Because the device only needs to manually place the mechanical part when coating the paint on the mechanical part, and no manual operation is required during the coating process, which makes the device not only more convenient, but also saves the staff from touching the paint. Thus, the health of the staff is protected. When the mechanical parts are painted by the device, the paint is located inside the housing 1, thereby reducing the contact range between the paint and the air, thereby reducing the pollution of the paint to the air. The painting device 11 includes a painting block 111 and a painting roller 112. When the painting device 11 is painting, the reciprocating rod 3 drives the moving block 4 to move back and forth, and the moving block 4 drives the painting block 111 to move back and forth through the guide rod 10. When the painting roller 112 under the painting block 111 contacts the mechanical parts, the back and forth movement of the painting block 111 causes the painting roller 112 to roll on the outer surface of the mechanical parts. , so that the coating roller 112 coats the paint onto the outer surface of the mechanical parts, and a storage shell 17 is fixedly connected to one side of the outer wall of the moving block 4, so that the staff can fill the paint into the storage shell 17, because the storage shell 17 and the storage slot 16 on the coating block 111 are connected through the connecting pipe 18, so that the paint in the storage shell 17 enters the storage slot 16 through the connecting pipe 18, so that the paint adheres to the outer surface of the coating roller 112, so that the rotation of the coating roller 112 can coat the paint onto the outer surface of the mechanical parts, and a square through groove 24 is opened at the top of the outer wall of the housing 1, and the square through groove 24 is located above the moving block 4;A cover plate 25 is hingedly connected to one side of the inner wall of the square through groove 24, so that when the staff replenishes the paint, they only need to open the cover plate 25, so that the device is not only more convenient for painting the mechanical parts, but also the staff only needs to replenish the paint once every period of time to make the device continue to work, so that the device reduces the workload of the staff, and replenishing the paint is also more convenient, and by rotating the threaded rod 19, because the threaded rod 19 is threadedly connected to the moving block 4, the rotation of the threaded rod 19 causes the threaded rod 19 to move up and down, so that the up and down movement of the threaded rod 19 drives The circular block 20 and the spring 21 move up and down, so that the smear block 111 can move up and down, so that the device can adjust the height of the smear block 111 according to the height of the mechanical parts, so that the practicality of the device is further improved, and the smear block 111 is connected to the circular block 20 through the spring 21, so that when the smear block 111 encounters mechanical parts with different concave and convex shapes, the mechanical parts with different concave and convex shapes will contact the inclined surface of the smear block 111, so that the mechanical parts with different concave and convex shapes continue to move, which will cause the smear block 111 to move up, and the spring 21 will contract. Therefore, when the smearing block 111 is applying paint to mechanical parts with different concave and convex surfaces, it will not block the mechanical parts with different concave and convex surfaces and cause them to get stuck. Moreover, due to the elasticity of the spring 21, when the smearing block 111 is applying paint to mechanical parts with different concave and convex surfaces, the outer surface of the mechanical parts at the convex part will cause the smearing block 111 to move up for painting, and the outer surface of the mechanical parts at the concave part will cause the spring 21 to bounce the smearing block 111, so that the smearing block 111 will apply paint to the mechanical parts at the concave part. Therefore, when the device is applying paint to mechanical parts with different concave and convex parts, it will not only not block the mechanical parts with different concave and convex parts, but also The outer surfaces of mechanical parts with different concave and convex shapes will be painted, and the cover plate 25 makes it easier to adjust the threaded rod 19, and a collecting shell 22 is placed by sliding at the bottom of the inner wall of the housing 1, so that when the smear block 111 and the smear roller 112 are idle, the paint may fall from the outer surface of the smear roller 112. Since the collecting shell 22 is located below the smearing device 11, the collecting shell 22 can collect the paint falling from the smear roller 112, so that the paint will not be wasted, and a pull rod 23 is fixed to one side of the outer wall of the collecting shell 22, so that the staff can easily place and take the collecting shell 22. ;

[0025] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A paint coating device for the surface of mechanical parts, comprising a housing (1); the outer wall of the housing (1) has openings at opposite ends; a motor (2) is fixedly connected to one side of the outer wall of the housing (1) via a fixing block; a reciprocating rod (3) is provided at the output end of the motor (2), and one end of the outer wall of the reciprocating rod (3) penetrates through one side of the outer wall of the housing (1) and is rotatably connected to one side of the inner wall of the housing (1); a moving block (4) is provided on the outer side wall of the reciprocating rod (3); the characteristics are as follows: A first roller (5) is rotatably connected to one side of the inner wall of the shell (1), and one end of the outer wall of the first roller (5) passes through the shell (1); a group of second rollers (6) are rotatably connected to one side of the inner wall of the shell (1), and one end of the outer wall of the group of second rollers (6) passes through the shell (1), and the first roller (5) and the group of second rollers (6) are distributed in a straight line; the outer wall of the end of the reciprocating rod (3) that does not pass through the shell (1) is provided with a transmission member through a first sprocket (7), and the first roller (5) and the second roller (6) are both rotated through the transmission member; the transmission member includes a second sprocket (8); a limit plate (9) is fixedly connected to one side of the inner wall of the shell (1), and the bottom end of the outer wall of the limit plate (9) is in contact with the top end of the outer wall of the moving block (4); the bottom end of the outer wall of the moving block (4) is provided with a smearing device (11) through a guide rod (10).

2. A paint coating device for mechanical parts according to claim 1, characterized in that: The inner side wall of the first sprocket (7) is fixedly connected to the outer side wall of the reciprocating rod (3); one end of the outer wall of the second sprocket (8) is fixedly connected to one end of the outer wall of the first roller (5), and the first sprocket (7) and the second sprocket (8) are connected by a chain (12); the outer side wall of the first roller (5) and one end of the outer wall of a group of second rollers (6) are fixedly connected to a first gear (13); one side of the outer wall of the shell (1) is rotatably connected to a group of second gears (14) through a group of first round rods, and the group of second gears (14) and the group of first gears (13) are staggered and respectively; the group of second gears (14) and the group of first gears (13) are meshed with each other.

3. A paint coating device for mechanical parts according to claim 2, characterized in that: The smearing device (11) comprises a smearing block (111) and a smearing roller (112); a pair of first through grooves (15) are provided at the bottom end of the outer wall of the smearing block (111), and the first through grooves (15) are in an arc shape; a storage groove (16) is provided at the top end of the inner wall of the first through groove (15), and the storage groove (16) is connected to the first through groove (15); the two ends of the outer walls of the pair of smearing rollers (112) are rotatably connected to the opposite sides of the inner walls of the pair of first through grooves (15); a storage shell (17) is fixedly connected to one side of the outer wall of the moving block (4), and the storage shell (17) and the storage slot (16) are connected through a connecting pipe (18); a square through groove (24) is provided at the top end of the outer wall of the shell (1), and the square through groove (24) is located above the moving block (4); a cover plate (25) is hingedly connected to one side of the inner wall of the square through groove (24).

4. The paint coating device for mechanical parts according to claim 3 is characterized in that: The bottom end of the outer wall of the guide rod (10) is fixedly connected to the top end of the outer wall of the smear block (111), and the top end of the outer wall of the guide rod (10) passes through the moving block (4), and the guide rod (10) is slidably connected to the moving block (4); the top end of the outer wall of the moving block (4) is threadedly connected to a threaded rod (19), and the bottom end of the outer wall of the threaded rod (19) passes through the moving block (4); the bottom end of the outer wall of the threaded rod (19) is rotatably connected to a circular block (20); the bottom end of the outer wall of the circular block (20) is fixedly connected to a spring (21), and the bottom end of the outer wall of the spring (21) is fixedly connected to the top end of the outer wall of the smear block (111); a slope is provided at one side corner of the outer wall of the smear block (111).

5. The paint coating device for mechanical parts surface according to claim 4 is characterized in that: A collecting shell (22) is slidably placed at the bottom end of the inner wall of the shell (1); a pull rod (23) is fixedly connected to one side of the outer wall of the collecting shell (22); and the collecting shell (22) is located below the smearing device (11).

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