CN115090448B

CN115090448B - Paint spraying device for automobile parts

Info

Publication number: CN115090448B
Application number: CN202210691360.5A
Authority: CN
Inventors: 雷文全; 张承红; 崔绍波
Original assignee: Chongqing Wanglin Auto Parts Co ltd
Current assignee: Chongqing Wanglin Auto Parts Co ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2023-03-31
Anticipated expiration: 2042-06-17
Also published as: CN115090448A

Abstract

The invention belongs to the technical field of spraying equipment, and particularly relates to a paint spraying device for automobile accessories, which comprises a conveying mechanism, an air supply mechanism, a spraying mechanism and a spraying chamber, wherein the conveying mechanism is arranged on the conveying mechanism; the conveying mechanism comprises a track, a conveying chain, a hanging part and a power part; the hanging part comprises an installation block, a rotating gear is connected to the installation block in a rotating mode, and a hook is arranged on the lower portion of the rotating gear; the spraying mechanism is arranged in the spraying chamber, the track passes through the spraying chamber and surrounds the spraying mechanism, and the track is surrounded into an arc shape in the spraying chamber; the spraying mechanism comprises a rotating column, a cam slideway, a feeding pipe, a pull rod, a driving part and two spraying parts; the spraying part comprises a connecting rod, an annular pipe and a spray head; one end of the connecting rod is hinged on the annular pipe, the other end of the connecting rod is hinged on the pull rod, and the free end of the pull rod is clamped and connected on the cam slideway in a sliding manner. By the scheme, the problem that spraying dead angles exist easily when spraying is carried out on automobile parts which are relatively long in length and irregular can be effectively solved.

Description

Paint spraying device for automobile parts

Technical Field

The invention belongs to the technical field of spraying equipment, and particularly relates to a paint spraying device for automobile accessories.

Background

The quality of the rust-proof and corrosion-proof coating is one of the important aspects of the overall quality of the product. The surface treatment is carried out on the automobile parts by spraying paint, the requirements of corrosion resistance, wear resistance, decoration or other special functions of the product are met, and the paint is an important factor forming the value of the product. The existing process flow for spraying paint on automobile parts comprises the following steps: the automobile parts are transported to a paint spray booth through the conveying rail, then the automobile parts are sprayed by the automatic spraying equipment, and the conveying rail conveys the automobile parts away after the spraying is finished. By adopting the mode, the automobile parts with relatively regular shapes can be well sprayed, but dead angles easily exist in the spraying process of the automobile parts with relatively long lengths and irregular shapes, so that the automobile parts cannot be completely sprayed for 360 degrees at one time, and the spraying effect of the automobile parts is influenced to a certain extent.

Disclosure of Invention

The invention aims to provide a paint spraying device for automobile parts, which aims to solve the problem that spraying dead angles are easily caused when the automobile parts with relatively long lengths and irregular lengths are sprayed.

In order to achieve the purpose, the scheme of the invention is as follows: a paint spraying device for automobile parts comprises a conveying mechanism, an air supply mechanism, a spraying mechanism and a spraying chamber; the conveying mechanism comprises a track, a conveying chain movably connected to the track, a plurality of hanging parts connected to the lower part of the conveying chain and a power part for driving the conveying chain to run; the hanging part comprises a mounting block fixed on the conveying chain, a rotating gear is connected to the mounting block in a rotating mode, and a hook is arranged at the lower part of the rotating gear; the spraying mechanism is arranged in the spraying chamber, the rail passes through the spraying chamber and surrounds the spraying mechanism, and the rail forms an arc shape in the spraying chamber; an arc-shaped inner rack which can be meshed with the rotating gear is arranged in the spraying chamber; the spraying mechanism comprises a rotating column, a cam slideway, a feeding pipe, a horizontally arranged pull rod, a driving part for driving the rotating column to rotate in a reciprocating manner and two spraying parts, and the two spraying parts are symmetrically arranged by taking the pull rod as a center; the spraying part comprises a connecting rod, an annular pipe which can only move up and down along the rotating column and a spray head arranged on the annular pipe, the feeding pipe is used for conveying coating for the spray head, and the air supply mechanism is used for conveying air for the spray head; one end of the connecting rod is hinged on the annular pipe, the other end of the connecting rod is hinged on the pull rod, and the free end of the pull rod is clamped and connected on the cam slideway in a sliding manner.

The working principle of the scheme is as follows: when the automobile parts need to be sprayed, the automobile parts to be sprayed are hung on the hook, then the power part is started, and the transmission chain is driven to operate through the power part. The conveyor belt drives the auto-parts on the hooks to move along the rails. When auto-parts got into the spray booth, rotating gear and arc inner rack contact, and rotating gear takes place to rotate under the effect of arc inner rack, and rotating gear drives the auto-parts on the couple and takes place the rotation. The driving part is started, so that the rotating column continuously rotates in a reciprocating mode, the rotating column drives the annular pipe to move together, the annular pipe drives the pull rod to move together through the connecting rod, the pull rod moves along the cam slideway, and the distance between the pull rod and the rotating column can be changed. When the distance between the pull rod and the rotating column is reduced, the pull rod applies thrust to the two connecting rods, so that the distance between the two annular pipes is increased; when the distance between the pull rod and the rotating column becomes longer, the pull rod applies pulling force to the two connecting rods, so that the distance between the two annular pipes becomes shorter. In the process, the spray head on the annular pipe continuously moves up and down and rotates back and forth. Paint is conveyed to the spray head through the feeding pipe, air is conveyed to the spray head through the air supply mechanism, and vaporific paint is sprayed out of the spray head and then sprayed on the autorotation automobile accessories. After finishing painting in the painting chamber, the automobile parts are transported out through the conveying chain.

The beneficial effect of this scheme lies in: in this scheme, when carrying out the spraying to auto-parts in the spray booth, auto-parts can take place the rotation, avoids auto-parts to keep away from one side of shower nozzle and can not obtain effective spraying. The spray heads are arranged on the two annular pipes, the spray heads on the two annular pipes can spray the automobile parts from the upper end and the lower end of the automobile parts, and even if the automobile parts are long in length, the two ends of the automobile parts can be effectively sprayed. In the spraying process, the spray head can continuously reciprocate and rotate and simultaneously can continuously move up and down, so that even if irregular automobile parts are adopted, the spray head can be comprehensively sprayed without dead angles, and the spraying quality is ensured.

Optionally, a mixing cavity, an air inlet channel, a feeding channel and a nozzle are formed in the nozzle, the air inlet channel and the feeding channel are communicated with the mixing cavity, and the air inlet channel and the feeding channel are perpendicular to each other. The coating gets into the mixing chamber from the feedstock channel, and the air gets into the mixing chamber from inlet channel, because inlet channel and feedstock channel mutually perpendicular, the coating can take place fiercely collision with the air for the coating forms vaporific spout from the spout blowout, uses vaporific coating to carry out the spraying to auto-parts, not only can effectively reduce the quantity of coating, can also make the quality of spraying better.

Optionally, an upper cavity is formed in the upper part of the rotating column, one end of the feeding pipe extends into the rotating center of the rotating column and is rotatably connected with the rotating column, and the feeding pipe is communicated with the upper cavity; the feeding channel is communicated with the annular pipe; the rotating column is connected with two first corrugated pipes which are communicated with the upper cavity, and one ends of the two first corrugated pipes are communicated with different annular pipes respectively. Set up like this but not directly with conveying pipe and ring pipe intercommunication, can avoid the conveying pipe along with the continuous reciprocating rotation of ring pipe and move from top to bottom to cause the pipeline winding.

Optionally, the driving part comprises a power gear, an incomplete gear, a movable frame and a driving motor for driving the incomplete gear to rotate, and the power gear is fixed on the rotating column; a first rack meshed with the power gear is arranged on one side of the movable frame; and two side walls inside the movable frame are respectively provided with a second rack which can be meshed with the incomplete gear. And starting the driving motor, driving the incomplete gear to rotate by the driving motor, and in the rotating process of the incomplete gear, alternately meshing the incomplete gear with the two second racks to ensure that the movable frame continuously reciprocates. Under the action of the first rack of the movable frame, the power gear drives the rotating column to do continuous reciprocating motion.

Optionally, a connecting pipe is arranged on the annular pipe, and the air inlet channel is communicated with the connecting pipe; the air supply mechanism comprises an air supply pipe and two symmetrically arranged air supply parts, each air supply part comprises a piston cylinder and a piston connected in the piston cylinder in a sliding manner, and two ends of the movable frame are respectively connected with different pistons; the piston cylinder is connected with a branch pipe communicated with the air supply pipe, the branch pipe is provided with a one-way exhaust valve, and the piston cylinder is provided with a one-way intake valve; a lower cavity is formed in the lower part of the rotating column, one end of the air supply pipe extends into the rotating center of the rotating column and is rotatably connected with the rotating column, and the air supply pipe is communicated with the lower cavity; the rotating column is connected with two second corrugated pipes which are communicated with the lower cavity, and one ends of the two second corrugated pipes are respectively communicated with different connecting pipes.

In the process that the moving frame continuously reciprocates, the moving frame alternately applies thrust and pull to the pistons in the two piston cylinders. When the movable frame applies thrust to the piston, the piston extrudes air in the piston cylinder, the pressure in the piston cylinder is increased, the one-way exhaust valve on the branch pipe is automatically opened, and the compressed air in the piston cylinder enters the air inlet channel of the spray head through the branch pipe, the air supply pipe and the connecting pipe; when the moving frame exerts pulling force on the piston, the pressure in the piston cylinder is reduced, the one-way air inlet valve on the piston cylinder is opened, and the outside air can be supplemented into the piston cylinder. In the scheme, the compressed air is prepared by utilizing the power of the driving part, the supply of a nozzle air source is ensured, the nozzle can spray the foggy coating, an air compressor is not required to be additionally arranged, and the cost of the device is reduced.

Optionally, 3 spray heads are arranged on one annular pipe, and the arc length formed by the 3 spray heads between the annular pipes accounts for 1/6-1/3 of the circumference of the annular pipe; 2 spray heads on the same plane on the two annular pipes form an included angle of 90-150 degrees. Tests show that the spraying effect is good due to the arrangement of the spraying device, and automobile accessories can be fully sprayed.

Optionally, the side wall of the rail is provided with grooves distributed along the rail, the upper end of the conveying chain is fixed with a mounting frame, and the mounting frame is rotatably connected with rollers located in the grooves. Through the arrangement, the conveying chain can be stably supported through the grooves and the rollers, and meanwhile, the operation of the conveying chain is not limited, so that the hanging part can move along the track.

Optionally, the power section comprises a first motor, a speed reducer for controlling the output speed of the first motor, and a drive sprocket driven by the first motor, the drive sprocket being engaged with the conveyor chain.

Drawings

FIG. 1 is a top view of a painting apparatus for automobile parts according to the present invention;

FIG. 2 is a cross-sectional view of a hanging portion in a painting apparatus for automobile parts according to the present invention;

FIG. 3 is a sectional view of a painting mechanism in a painting apparatus for automobile parts according to the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 3;

fig. 5 is a sectional view of a gas supply mechanism in a paint spraying apparatus for automobile parts according to the present invention in a top view.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the spraying device comprises a spraying chamber 10, a rail 20, a groove 21, a roller 22, a mounting frame 23, a conveying chain 24, a mounting block 25, a rotating gear 26, a hook 27, an arc-shaped inner rack 28, a rotating column 30, an upper cavity 31, a lower cavity 32, a first corrugated pipe 33, a second corrugated pipe 34, an annular pipe 40, a connecting rod 41, a pull rod 42, a cam slideway 43, a connecting pipe 44, a spray head 50, a feeding channel 51, a feeding channel 52, a nozzle 53, a mixing cavity 54, a power gear 60, a piston cylinder 70, a one-way air inlet valve 71, a piston 72, a branch pipe 73, a one-way exhaust valve 74, a feeding pipe 80, an air feeding pipe 81, a moving frame 90, a second rack 91, a first rack 92 and an incomplete gear 93.

This embodiment is substantially as shown in fig. 1: a paint spraying apparatus for automobile parts includes a conveying mechanism, a gas supply mechanism, a spraying mechanism, and a spray booth 10. The transfer mechanism includes a transfer chain 24, a track 20 forming a closed loop, a plurality of hanging portions connected to a lower portion of the transfer chain 24, and a power portion for driving the transfer chain 24 to operate. The conveying chain 24 is movably connected to the rail 20, specifically, grooves 21 distributed along the rail 20 are formed in the side wall of the rail 20, a plurality of mounting frames 23 are welded to the upper end of the conveying chain 24, and rollers 22 located in the grooves 21 are rotatably connected to the mounting frames 23. As shown in fig. 2, the hanging part includes a mounting block 25 welded to a lower portion of the conveyor chain 24, a rotating gear 26 is rotatably connected to the mounting block 25, and a hook 27 for hanging the automobile parts is welded to a lower portion of the rotating gear 26. The power unit includes a first motor, a reducer, and a driving sprocket (not shown), wherein an output shaft of the first motor is connected to an input shaft of the reducer, the driving sprocket is welded to the output shaft of the reducer, the driving sprocket is engaged with the conveying chain 24, and when the driving sprocket rotates, the conveying chain 24 starts to move along the track 20.

The spray mechanism is arranged in a spray booth 10, a rail 20 passes through the spray booth 10 and surrounds the spray mechanism, and the rail 20 forms an arc in the spray booth 10. An inner arcuate rack 28 is provided in the spray booth 10 and is engageable with the rotary gear 26 such that when the conveyor chain 24 is operated, the conveyor chain 24 moves the rotary gear 26 together, and when the rotary gear 26 contacts the inner arcuate rack 28, the rotary gear 26 is rotated by the inner arcuate rack 28.

As shown in fig. 3, the spraying mechanism includes a rotating column 30, a cam slide 43, a feeding pipe 80, a driving part, a horizontally disposed pull rod 42, and two spraying parts symmetrically disposed with the pull rod 42 as a center. The spraying part includes a link 41, a ring pipe 40, and a spray head 50 mounted on the ring pipe 40, and a connection pipe 44 is fixed to a lower portion of the ring pipe 40. One or more spray heads 50 may be mounted on the annular tube 40, with the spray heads 50 facing the side of the track 20 defining the arc within the spray booth 10. In this embodiment, 3 spray heads 50 are installed on one annular tube 40, and 3 spray heads 50 form an arc length between the annular tubes 40 of 1/4 of the circumference of the annular tube 40. The 2 nozzles 50 located in the same plane on the two annular tubes 40 form an included angle of 120 °. As shown in fig. 4, the nozzle 50 has a mixing chamber 54, an air inlet channel 52, a feed channel 51 and a nozzle 53, the air inlet channel 52 and the feed channel 51 are all communicated with the mixing chamber 54, and the air inlet channel 52 and the feed channel 51 are perpendicular to each other. Annular pipe 40 sliding connection rotates on post 30, and annular pipe 40 can only reciprocate along rotating post 30, and is specific, and it has the bar draw-in groove that distributes along the direction of height to open on the post 30 to rotate, and the welding has the lug of sliding connection on the bar draw-in groove on the annular pipe 40. One end of the connecting rod 41 is hinged on the annular tube 40, the other end of the connecting rod 41 is hinged on the pull rod 42, and the free end of the pull rod 42 is clamped and connected on the cam slideway 43 in a sliding way. The cam slide 43 is located on one side of the rotating post 30, and the cam slide 43 is opposite to the rail 20 enclosing the arc shape in the painting chamber 10. The distances from different positions of the cam slideway 43 to the rotating column 30 are different, when the pull rod 42 moves along the cam slideway 43, the distance between the pull rod 42 and the rotating column 30 is changed, and when the distance between the pull rod 42 and the rotating column 30 is reduced, the pull rod 42 applies thrust to the two connecting rods 41, so that the distance between the two annular pipes 40 is increased; when the distance between the pull rod 42 and the rotation column 30 becomes longer, the pull rod 42 applies a pulling force to the two links 41, so that the distance between the two ring pipes 40 becomes shorter.

The driving part is used for driving the rotation column 30 to rotate back and forth, the driving part comprises a power gear 60, an incomplete gear 93, a moving frame 90 and a driving motor (not shown in the figure) for driving the incomplete gear 93 to rotate, and in order to control the rotation speed of the incomplete gear 93, a speed reducer can be arranged for controlling the output speed of the driving motor. The power gear 60 is welded to the rotating post 30, and a first rack 92 engaged with the power gear 60 is fixed to one side of the moving frame 90. The two side walls inside the moving frame 90 are both provided with second racks 91, and the incomplete gear 93 can be alternately meshed with the two second racks 91.

An upper cavity 31 is arranged in the upper part of the rotating column 30, one end of the feeding pipe 80 extends into the rotating center of the rotating column 30 and is connected with the rotating column 30 in a rotating and sealing way, and the feeding pipe 80 is communicated with the upper cavity 31. The rotary column 30 is connected with two first corrugated pipes 33 which are both communicated with the upper cavity 31, one end of each of the two first corrugated pipes 33 is respectively communicated with different annular pipes 40, and the annular pipes 40 are communicated with a feed passage 51 of the spray head 50.

As shown in fig. 5, the air supply mechanism includes an air supply pipe 81 and two symmetrically disposed air supply portions, the air supply portions include a piston cylinder 70 and a piston 72 slidably connected in the piston cylinder 70, and two ends of the movable frame 90 are fixedly connected to different pistons 72, respectively. A branch pipe 73 communicating with the air supply pipe 81 is connected to the piston cylinder 70, a one-way exhaust valve 74 is mounted on the branch pipe 73, and a one-way intake valve 71 is mounted on the piston cylinder 70. When the pressure in the piston cylinder 70 increases, the one-way exhaust valve 74 is automatically opened, and the air in the piston cylinder 70 flows into the air supply pipe 81 through the branch pipe 73; when the pressure in the piston cylinder 70 decreases, the one-way intake valve 71 automatically opens, and outside air enters the piston cylinder 70. The lower part of the rotating column 30 is provided with a lower cavity 32, one end of an air pipe 81 extends into the rotating center of the rotating column 30 and is connected with the rotating column 30 in a rotating and sealing way, and the air pipe 81 is communicated with the lower cavity 32. Two second corrugated pipes 34 are connected to the rotary column 30, both of which are communicated with the lower chamber 32, one ends of the two second corrugated pipes 34 are respectively communicated with different connecting pipes 44, and the connecting pipes 44 are communicated with the annular air inlet passage 52 of the nozzle 50.

When the automobile parts need to be sprayed, the automobile parts to be sprayed are hung on the hook 27, then the first motor and the speed reducer are started, the transmission chain 24 is driven to operate through the driving chain wheel, and the transmission chain 24 drives the automobile parts on the hook 27 to move along the track 20. When the automobile parts enter the spraying chamber 10, the rotating gear 26 is in contact with the arc-shaped inner rack 28, the rotating gear 26 rotates under the action of the arc-shaped inner rack 28, and the rotating gear 26 drives the automobile parts on the hook 27 to rotate. And starting a driving motor, wherein the driving motor drives the incomplete gear 93 to rotate, and in the rotating process of the incomplete gear 93, the incomplete gear 93 is alternately meshed with the two second racks 91, so that the movable frame 90 continuously reciprocates. The power gear 60 drives the rotary post 30 to reciprocate continuously under the action of the first rack 92 of the moving frame 90. The annular tube 40 is driven to move together during the continuous reciprocating rotation of the rotary column 30, at this time, the annular tube 40 drives the pull rod 42 to move together through the connecting rod 41, the pull rod 42 moves along the cam slideway 43, and the distance between the pull rod 42 and the rotary column 30 is changed. When the distance between the pull rod 42 and the rotary column 30 is reduced, the pull rod 42 applies thrust to the two connecting rods 41, so that the distance between the two annular tubes 40 is increased; when the distance between the pull rod 42 and the rotation column 30 becomes longer, the pull rod 42 applies a pulling force to the two links 41, so that the distance between the two ring pipes 40 becomes shorter. In this process, the spray head 50 on the ring pipe 40 is constantly moved up and down and reciprocally rotated.

While the moving frame 90 is continuously reciprocated, the moving frame 90 alternately applies pushing and pulling forces to the pistons 72 in the two piston cylinders 70. When the moving frame 90 applies a pushing force to the piston 72, the piston 72 presses the air in the piston cylinder 70, the pressure in the piston cylinder 70 increases, the one-way exhaust valve on the branch pipe 73 automatically opens, and the compressed air in the piston cylinder 70 enters the air inlet passage 52 of the nozzle 50 through the branch pipe 73, the air supply pipe 81 and the connecting pipe 44; when the moving frame 90 applies a pulling force to the piston 72, the pressure inside the piston cylinder 70 decreases, the one-way intake valve on the piston cylinder 70 opens, and the outside air can be supplied into the piston cylinder 70. At the same time, the coating is delivered to the spray head 50 through the feed pipe 80, and the coating flows through the feed pipe 80, the upper chamber 31, the first corrugated pipe 33, the annular pipe 40 in sequence and finally enters the mixing chamber 54 through the feed passage 51. Since the feed passage 51 and the intake passage 52 are perpendicular to each other, the dope entering from the feed passage 51 can collide violently with the air entering from the intake passage 52, so that the dope is formed into a mist to be jetted from the jet port 53 and then sprayed on the auto-parts which are rotating. After the painting of the automobile parts is completed in the painting booth 10, the automobile parts are carried out by the conveyor chain 24.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.

Claims

1. A paint spraying apparatus for auto parts characterized in that: comprises a conveying mechanism, an air supply mechanism, a spraying mechanism and a spraying chamber; the conveying mechanism comprises a track, a conveying chain movably connected to the track, a plurality of hanging parts connected to the lower part of the conveying chain and a power part for driving the conveying chain to run; the hanging part comprises a mounting block fixed on the conveying chain, a rotating gear is rotatably connected to the mounting block, and a hook is arranged at the lower part of the rotating gear; the spraying mechanism is arranged in the spraying chamber, the track passes through the spraying chamber and surrounds the spraying mechanism, and the track is surrounded into an arc shape in the spraying chamber; an arc-shaped inner rack which can be meshed with the rotating gear is arranged in the spraying chamber; the spraying mechanism comprises a rotating column, a cam slideway, a feeding pipe, a pull rod arranged horizontally, a driving part for driving the rotating column to rotate in a reciprocating manner and two spraying parts, wherein the two spraying parts are symmetrically arranged by taking the pull rod as a center; the spraying part comprises a connecting rod, an annular pipe which can only move up and down along the rotating column and a spray head arranged on the annular pipe, the feeding pipe is used for conveying coating for the spray head, and the air supply mechanism is used for conveying air for the spray head; one end of the connecting rod is hinged on the annular pipe, the other end of the connecting rod is hinged on the pull rod, and the free end of the pull rod is clamped and connected on the cam slideway in a sliding manner; the driving part comprises a power gear, an incomplete gear, a movable frame and a driving motor for driving the incomplete gear to rotate, and the power gear is fixed on the rotating column; a first rack meshed with the power gear is arranged on one side of the movable frame; two side walls in the movable frame are respectively provided with a second rack which can be meshed with the incomplete gear; the annular pipe is provided with a connecting pipe, and the air inlet channel is communicated with the connecting pipe; the air supply mechanism comprises an air supply pipe and two symmetrically arranged air supply parts, each air supply part comprises a piston cylinder and a piston connected in the piston cylinder in a sliding manner, and two ends of the movable frame are respectively connected with different pistons; the piston cylinder is connected with a branch pipe communicated with the air supply pipe, the branch pipe is provided with a one-way exhaust valve, and the piston cylinder is provided with a one-way intake valve; a lower cavity is formed in the lower part of the rotating column, one end of the air supply pipe extends into the rotating center of the rotating column and is rotatably connected with the rotating column, and the air supply pipe is communicated with the lower cavity; the rotating column is connected with two second corrugated pipes which are communicated with the lower cavity, and one ends of the two second corrugated pipes are respectively communicated with different connecting pipes.

2. The painting apparatus for automobile parts according to claim 1, wherein: a mixing cavity, an air inlet channel, a feeding channel and a nozzle are arranged in the spray head, the nozzle, the air inlet channel and the feeding channel are communicated with the mixing cavity, and the air inlet channel and the feeding channel are perpendicular to each other.

3. The paint spraying apparatus for automobile parts according to claim 2, characterized in that: an upper cavity is formed in the upper part of the rotating column, one end of the feeding pipe extends into the rotating center of the rotating column and is rotatably connected with the rotating column, and the feeding pipe is communicated with the upper cavity; the feeding channel is communicated with the annular pipe; the rotating column is connected with two first corrugated pipes which are communicated with the upper cavity, and one ends of the two first corrugated pipes are respectively communicated with different annular pipes.

4. The painting apparatus for automobile parts according to claim 1, wherein: 3 spray heads are arranged on one annular pipe, and the arc length formed by the 3 spray heads between the annular pipes accounts for 1/6-1/3 of the circumference of the annular pipe; the 2 spray heads on the same plane on the two annular pipes form an included angle of 90-150 degrees.

5. The paint spraying apparatus for automobile parts according to claim 1, characterized in that: the side wall of the track is provided with grooves distributed along the track, the upper end of the conveying chain is fixed with a mounting rack, and the mounting rack is rotatably connected with rollers positioned in the grooves.

6. The paint spraying apparatus for automobile parts according to claim 4, characterized in that: the power part comprises a first motor, a speed reducer used for controlling the output speed of the first motor and a driving chain wheel driven by the first motor, and the driving chain wheel is meshed with the conveying chain.