Chain type suspension conveying device suitable for metal part production line

Abstract

The invention discloses a chain type suspension conveying device suitable for a metal part production line, relates to the technical field of suspension conveying of metal parts, and aims to solve the problems that when a plurality of groups of workpieces are suspended and sprayed on a conveying chain, the workpieces are easy to collide in the autorotation process due to the size problem of the workpieces, the subsequent spraying is influenced, and the workpieces are damaged. According to the metal part spraying device, a containing frame is installed on a suspension conveying frame, multiple sets of universal joints and universal joint bottom hooks are assembled through the containing frame, multiple sets of metal parts can be synchronously placed and moved, meanwhile, collision in the metal part spraying process is avoided, and a gear located at the end of a second rotating shaft automatically rotates after making contact with a second rack on a function plate; and after the check block located on the fluted disc makes contact with the top column at the bottom of the rotating block, the rotating block rotates, the swing plate on the other side is synchronously driven to rotate, the universal joint on the single side is pushed to rotate through the limiting column on the swing plate, and the distance between the metal parts is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of metal parts suspension conveying, and in particular to a chain-type suspension conveying device suitable for a metal parts production line. Background Art

[0002] Suspension conveyors consisting of a rail system and a separate roller running along it have been known for a long time and are used to transport loads of various sizes. The structure of each suspension conveyor depends to a large extent on the load to be transported. Chain suspension conveyors are machines for transporting goods by means of a continuously moving endless chain passing around a number of sprockets. They are widely applicable.

[0003] For the online spraying suspension conveying of common metal parts, as mentioned in the invention patent with publication number CN118107955A, by increasing the number of hooks on the suspension self-rotating mechanism, the number of workpieces conveyed on the entire conveyor chain can be more during the spraying operation, which greatly improves the spraying work efficiency. In addition, when spraying multiple workpieces suspended under the same suspension self-rotating mechanism, each workpiece can rotate synchronously in the same direction, which can effectively avoid uneven spraying.

[0004] However, considering the spacing of metal parts on the chain suspension conveyor line, especially special-shaped parts, they are prone to collision due to size issues during the self-rotation spraying process, which limits the spraying range of the parts surface and causes collision and scratches on the parts in serious cases.

[0005] To this end, we propose a chain suspension conveyor device suitable for metal parts production lines. Summary of the invention

[0006] The purpose of the present invention is to provide a chain-type suspended conveying device suitable for a metal parts production line, so as to solve the problem proposed in the above background technology that when multiple groups of workpieces are suspended and sprayed on a conveyor chain, collisions may easily occur during the rotation process due to workpiece size problems, affecting subsequent spraying and causing damage to the workpieces.

[0007] To achieve the above object, the present invention provides the following technical solution: a chain-type suspension conveying device suitable for a metal parts production line, comprising a suspension conveying frame and a driving mechanism, the suspension conveying frame is fixedly connected to the driving mechanism by threads, a chain is movably connected inside the suspension conveying frame, locking rods are evenly connected to the chain, and the driving mechanism is meshedly connected to the chain;

[0008] One end of the two locking rods is movably connected to a placement rack, the bottom of the placement rack is fixed with a storage shell by bolts, the bottom of the storage shell is symmetrically movably connected with a universal joint, and one end of the universal joint passes through the storage shell sleeve and is fixed with a gear, and one end of the universal joint is fixed with a hook by spot welding.

[0009] Furthermore, the placement rack is movably connected with a swing mechanism, and the swing mechanism includes a rotating sleeve, a rotating block and a swing plate. The placement rack is movably connected with a rotating sleeve, and one side of the rotating sleeve is movably connected to the storage shell, one end of the rotating sleeve is fixed with a rotating block by spot welding, and the bottom of the rotating block is symmetrically fixed with a top column by spot welding, and the other end of the rotating sleeve is sleeved and fixed with a swing plate, and a limiting column is fixed to one side of the swing plate by spot welding, and a limiting groove is provided on the side opposite to the swing plate and the placement rack.

[0010] Furthermore, a rotating shaft 1 is movably connected in the storage shell, one end of which passes through the storage shell and the rotating sleeve and is fixed with a gear. The rotating shaft 1 is located in the storage shell and is sleeved with a gear that is meshed and connected with the gear sleeved at the end of the universal joint.

[0011] Furthermore, a second rotating shaft is movably connected to one side of the top of the placement rack, a toothed disc is movably connected to the top of the placement rack, a stopper is fixed to the top of the toothed disc by spot welding, and a gear is sleeved on the second rotating shaft and meshed with the toothed disc.

[0012] Furthermore, a slider 1 is slidably connected in the limiting groove, a spring is sleeved and installed in the limiting groove and on one side of the slider 1, and a connecting rod is movably connected to one side of the slider 1.

[0013] Furthermore, a swivel column is threadedly connected to the bottom of the placement rack, a slider 2 is slidably connected to the placement rack, one end of the swivel column is movably connected to the slider 2, and one end of the connecting rod is movably connected to the outer wall of the slider 2.

[0014] Furthermore, a functional plate is fixed to the inner wall of one side of the hanging conveyor frame by bolts, and rack one and rack two are fixed to one side of the functional plate by bolts from top to bottom respectively, and rack one is arranged correspondingly to the gear at the end of rotating shaft one, and rack two is arranged correspondingly to the gear at the end of rotating shaft two.

[0015] The chain suspension conveying method suitable for metal parts production lines is:

[0016] The operator transports metal parts on the conveyor belt, uses a mechanical arm or manual placement operation to put the metal parts on the hook, drives the chain in the hanging conveyor frame to rotate through the driving mechanism, and the lock rod on the chain moves to pull the hook on the placement frame to move, so as to realize the movement of the metal parts;

[0017] The rack on the inner side of the function plate on the hanging conveyor rack is installed according to the spraying range of the metal parts. When the metal parts enter the spraying area, the gear on the second rotating shaft on the back side of the placement rack contacts the second rack on the function plate. The rotation of the second rotating shaft drives the stopper on the toothed disc to contact the top column at the bottom of the rotating block, causing the rotating sleeve connected to the rotating block to rotate, thereby realizing the swing plate side The limit column swings, and the limit column pushes the hook at the bottom of the universal joint on one side to swing, so that the distance with the universal joint on the other side is increased. Under the continuous rotation of the second rotating shaft, the continuously rotating toothed disc causes the stopper to continuously contact the top columns on both sides, causing the swing plate to continuously swing, and continuously drives the metal parts on both sides to rotate during the rotation of the universal joint, so that the surface spraying of the metal parts is more uniform, and at the same time, the collision of metal parts of different sizes is avoided. The rotary column at the bottom of the placement rack is manually rotated, and the rotary column pushes the slider 2 to move upward, and pushes the slider 1 in the limit slot to move through the connecting rod, so as to adjust the rotation angle of the single-side rotary sleeve and expand the distance that the limit column pushes the universal joint.

[0018] As the gear on the rotating shaft 1 contacts the rack 1 on the functional plate, the rotation of the rotating shaft 1 drives the two universal joints in the storage shell to rotate, so that the two hooks at the ends of the universal joints are separated and rotated at the same time, and the metal parts on the hooks rotate to complete the spraying work.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, by installing a placement rack on a hanging conveyor rack, and using the placement rack to assemble multiple sets of universal joints and hooks at the bottom of the universal joints, multiple sets of metal parts can be placed and moved synchronously, and collision of metal parts during spraying can be avoided. The gears at the two ends of the rotating shaft automatically rotate after contacting the second rack on the functional plate, and drive the gear plate to rotate. After the stopper on the gear plate contacts the top column at the bottom of the rotating block, the rotating block is rotated, and the swing plate on the other side is driven to rotate synchronously. The upper limit column of the swing plate is used to push the single-side universal joint to rotate, thereby increasing the distance between the metal parts and avoiding the collision problem during the rotation of the metal parts.

[0021] 2. In the present invention, by moving the movable shaft 1 in the rotating sleeve and cooperating with the installation of the rack 1 on the functional plate, after entering the spraying working area, the rotation of the shaft 1 drives the rotation of multiple sets of universal joints in the storage shell, and finally realizes the rotation of the metal parts at the bottom of the hook, so as to achieve more uniform spraying of the metal parts.

[0022] 3. In the present invention, considering the different sizes of metal parts, the single swing distance of the limit column cannot adapt to the rotary spraying of various types of metal parts. For this reason, the rotary column at the bottom of the placement frame can be rotated to push the slider 2 to move, and the connecting rod movably connected on the slider 2 is used to push the slider 1 in the limit groove behind the swing plate to slide. The connecting rod pushes the slider 1 to slide and also drives the swing plate to rotate, thereby realizing the adjustment of the single rotation amplitude of the swing plate, and the limit column drives the universal joint to increase the swing angle, further avoiding the collision problem caused by the switching of metal parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a chain-type suspension conveying device applicable to a metal parts production line of the present invention;

[0024] Figure 2 This is a schematic diagram of the installation connection structure of the hook on the lock rod of the present invention;

[0025] Figure 3 It is a schematic diagram of the meshing of a gear on one side of the rotating shaft of the placement rack and a rack on the functional board of the present invention;

[0026] Figure 4 It is a side view structural schematic diagram of the placement rack of the present invention;

[0027] Figure 5 It is a schematic diagram of the overall structure of the swing mechanism of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure in which the second slider on the placement rack of the present invention abuts against the first slider in the limiting groove;

[0029] Figure 7 It is a schematic diagram of the connecting hook structure of the end of the universal joint of the present invention.

[0030] In the figure: 1. hanging conveyor rack; 2. driving mechanism; 3. chain; 4. locking rod; 5. placing rack; 6. swing mechanism; 601. rotating sleeve; 602. rotating block; 603. top column; 604. swing plate; 605. limiting column; 606. limiting groove; 7. storage shell; 8. rotating shaft 1; 9. rotating shaft 2; 10. gear plate; 11. stopper; 12. universal joint; 13. hook; 14. slider 1; 15. spring; 16. connecting rod; 17. slider 2; 18. rotating column; 19. functional board; 20. rack 1; 21. rack 2. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-7 , the present invention provides a technical solution:

[0033] Embodiment 1: Metal parts are sprayed online and suspended and conveyed. The main body is composed of a fixed suspension conveyor frame 1. A driving mechanism 2 is installed on the suspension conveyor frame 1 to drive the chain 3 to rotate. The half side is located in the spraying workshop. Multiple groups of hooks 13 on the suspension conveyor frame 1 are used to drive the metal parts to rotate and move. The hooks 13 rotate during the movement in conjunction with the functional board 19 installed in the spraying workshop, which facilitates multi-angle and multi-surface spraying of metal parts.

[0034] like Figure 3 As shown, a chain 3 is movably connected inside the hanging conveyor frame 1, a driving assembly is installed on the top of the hanging conveyor frame 1 to drive the chain 3, and locking rods 4 installed on the chain 3 are arranged in groups of two and are installed on both sides of the placement frame 5, thereby driving the entire placement frame 5 to move at the bottom of the hanging conveyor frame 1;

[0035] like Figure 2 A storage shell 7 is fixed at the bottom of the single placement rack 5 shown, and a universal joint 12 is symmetrically and movably connected to the bottom of the storage shell 7. A hook 13 is also fixedly connected below the node of the universal joint 12. The metal part to be sprayed is actively hung on the hook 13 by using an outer mechanical arm or manual loading. A swing mechanism 6 is also installed between the two universal joints 12;

[0036] like Figure 5 As shown, the main rotating sleeve 601 of the swing mechanism 6 passes through the placement rack 5, and a swing plate 604 is fixed in front of the placement rack 5. A limiting column 605 is fixed to one side of the swing plate 604 by spot welding. The limiting column 605 is located between the universal joints 12 on both sides. The limiting column 605 is swung left and right to drive the hooks 13 between the two universal joints 12 to move, thereby expanding the distance between the hooks 13 at the bottom of the universal joints 12. After the universal joint 12 rotates, the metal parts on the bottom hooks 13 are driven to rotate, and the rotation distance between each other is increased, thereby avoiding the collision of the metal parts with each other due to size and shape restrictions during the rotation of the metal parts, hindering the uniform distribution of pigments on the surface of the metal parts, and causing the metal parts to be scratched and worn.

[0037] As for the control of the swing mechanism 6, Figure 3As shown, the spraying workshop is coordinated at the installation site of the hanging conveyor frame 1. Before spraying, the upper function board 19 is fixed on the inner side of the hanging conveyor frame 1, and the upper rack 1 20 and the rack 2 21 are correspondingly installed on the function board 19, and the single group placement rack 5 is pushed to move on the side of the function board 19 to see whether the gear at the end of the rotating shaft 1 8 and the gear at the end of the rotating shaft 2 9 can be set correspondingly with the rack 1 20 and the rack 2 21, that is, whether the gear at the end of the rotating shaft 1 8 can contact the rack 1 20, and whether the gear on the rotating shaft 2 9 can contact the rack 2 21;

[0038] The installation of the functional plate 19 passively controls the rotation of the rotating shaft 1 8 and the rotating shaft 2 9, so that the universal joint 12 can be swung and rotated in the spraying workshop. For the swing of the universal joint 12, a rotating block 602 is fixedly mounted on the other end of the rotating sleeve 601, and a top column 603 is symmetrically fixed to the bottom of the rotating block 602. A gear plate 10 is movably connected to the placement frame 5, and a stopper 11 fixedly connected to the gear plate 10 drives the gear plate 10 to rotate with the rotation of the rotating shaft 2 9. During the rotation of the stopper 11 on the gear plate 10, it contacts the top column 603 at the bottom of the rotating block 602. The unilateral lifting of the top column 603 causes the rotating block 602 to rotate, and the rotation of the rotating block 602 will realize the rotation of the swing plate 604 at the end of the rotating sleeve 601. Therefore, the side limit column 605 of the swing plate 604 begins to contact the single side of the universal joint 12, so that the distance between the two universal joints 12 can be adjusted.

[0039] As for the rotation adjustment of the universal joint 12, Figure 7 As shown, a gear is sleeved on the end of the rotating shaft 8 movably connected in the rotating sleeve 601, and the gear on the rotating shaft 8 automatically rotates after contacting the tooth plate 1, and the other end of the rotating shaft 8 extends into the storage shell 7, and a gear is sleeved on the rotating shaft 8 in the storage shell 7, and at the same time, the universal joint 12 is located in the storage shell 7 and is fixedly connected with a gear. The rotation of the rotating shaft 8 drives the universal joint 12 on one side to rotate, and at the same time, a single rotation of the rotating shaft 8 will also drive the universal joint 12 on the other side to rotate. The universal joints 12 at the bottom of the storage shell 7 rotate in the same direction at the same time, and are staggered under the intervention of the limiting column 605, so as to avoid the metal parts on the hook 13 from abutting against each other at some positions after synchronous rotation due to size limitations, resulting in limited spraying of the metal parts;

[0040] With regard to the hanging of multiple metal parts at the bottom of the placement rack 5, three metal parts are taken as an example here, by adding a set of swing mechanisms 6 on one side of the placement rack 5, the position of the stop block 11 on the gear plate 10 is controlled at the same time, wherein one stop block 11 is located between the two top columns 603, and the other stop block 11 is located on one side of the single top column 603, and the position adjustment of the rack 21 installed on the function plate 19 is coordinated, so that after the placement rack 5 moves, the upper limit rods on the swing plates 604 on both sides respectively push the universal joints 12 on both sides to both sides, thereby expanding the distance between the three metal parts.

[0041] Embodiment 2: Considering that the swinging interval of different metal parts is not fixed when they are swinging, it is necessary to adjust the swinging amplitude of the swing plate 604 in the early stage of spraying the metal parts;

[0042] like Figure 6 As shown, a limiting groove 606 is provided at the rear of the swing plate 604, and a slider 14 is slidably connected in the limiting groove 606. At the same time, a spring 15 is sleeved and installed on one side of the slider 14 in the limiting groove 606, and a connecting rod 16 is movably sleeved on the slider 14. A slider 2 17 is also slidably connected at the bottom of one side of the placement rack 5, and one end of a swivel column 18 movably connected at the bottom of the placement rack 5 is movably connected to the slider 2 17 on the placement rack 5. At the same time, the swivel column 18 is threadedly connected to the placement rack 5. The operator rotates the swivel column 18 at the bottom of the placement rack 5, and the swivel column 18 rotates while pushing the slider 2 17 to move, and the other end of the connecting rod 16 is movably connected to the slider 2 17;

[0043] When the slider 2 17 moves upward, it will push the slider 14 to move. At the same time, under the push of the spring 15, the entire swing plate 604 rotates to the upper left, and the rotation amplitude increases. Similarly, as the rotating column 18 moves downward, the rotation amplitude of the entire swing plate 604 decreases. The operator can automatically adjust according to the size change of the metal parts during the rotation process. The adjustment is flexible and further avoids collisions of metal parts during the spraying process.

[0044] In the present invention, the operator transports the metal parts on the conveyor belt, uses a mechanical arm or manual placement operation, sets the metal parts on the hook 13, drives the chain 3 in the hanging conveyor frame 1 to rotate through the driving mechanism 2, and the locking rod 4 on the chain 3 moves to pull the hook 13 on the placement frame 5 to move, so as to realize the movement of the metal parts;

[0045] The rack inside the function plate 19 is installed on the hanging conveyor frame 1 according to the spraying range of the metal parts. When the metal parts enter the spraying area, the gear on the rotating shaft 29 on the back side of the placement frame 5 contacts the rack 21 on the function plate 19. The rotation of the rotating shaft 29 drives the stopper 11 on the gear plate 10 to contact the top column 603 at the bottom of the rotating block 602, causing the rotating sleeve 601 connected to the rotating block 602 to rotate, thereby realizing the swing of the limit column 605 on the side of the swing plate 604. The limit column 605 pushes the hook 13 at the bottom of the universal joint 12 on one side to swing, so that the distance with the universal joint 12 on the other side is increased. When the shaft 2 9 is continuously rotating, the continuously rotating gear disc 10 causes the block 11 to continuously contact the top columns on both sides, causing the swing plate 604 to continuously swing, and continuously driving the metal parts on both sides to rotate during the rotation of the universal joint 12, so that the surface of the metal parts is sprayed more evenly, and at the same time, the rotation collision of metal parts of different sizes is avoided. The rotating column 18 at the bottom of the placement frame 5 is manually rotated, and the rotating column 18 pushes the slider 2 17 to move upward, and pushes the slider 14 in the limit groove 606 to move through the connecting rod 16, so as to adjust the rotation angle of the single-side rotating sleeve 601 and expand the distance that the limit column 605 pushes the universal joint 12;

[0046] As the gear on the rotating shaft 8 contacts the rack 20 on the function plate 19, the rotation of the rotating shaft 8 drives the two universal joints 12 located in the storage shell 7 to rotate, so that the two hooks 13 at the ends of the universal joints 12 are separated and rotated at the same time, and the metal parts on the hooks 13 rotate to complete the spraying work.

[0047] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0049] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention 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 present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A chain-type suspension conveying device suitable for a metal parts production line, comprising a suspension conveying frame (1) and a driving mechanism (2), wherein the suspension conveying frame (1) is fixedly connected to the driving mechanism (2) by means of threads, and characterized in that: A chain (3) is movably connected inside the suspension conveyor frame (1), a locking rod (4) is evenly connected to the chain (3), and the driving mechanism (2) is meshingly connected to the chain (3); One end of the two locking rods (4) is movably connected to a placement frame (5), the bottom of the placement frame (5) is fixed with a storage shell (7) by bolts, the bottom of the storage shell (7) is symmetrically movably connected with a universal joint (12), and one end of the universal joint (12) penetrates the storage shell (7) and is sleeved and fixed with a gear, and one end of the universal joint (12) is fixed with a hook (13) by spot welding.

2. The chain-type suspension conveyor device suitable for a metal parts production line according to claim 1 is characterized in that: The placement rack (5) is movably connected with a swing mechanism (6), and the swing mechanism (6) comprises a rotating sleeve (601), a rotating block (602) and a swing plate (604); A rotating sleeve (601) is movably connected to the placement rack (5), and one side of the rotating sleeve (601) is movably connected to the storage shell (7). A rotating block (602) is fixed to one end of the rotating sleeve (601) by spot welding, and a top column (603) is symmetrically fixed to the bottom of the rotating block (602) by spot welding. A swing plate (604) is sleeved and fixed to the other end of the rotating sleeve (601), and a limiting column (605) is fixed to one side of the swing plate (604) by spot welding. A limiting groove (606) is provided on the side of the swing plate (604) opposite to the placement rack (5).

3. The chain-type suspension conveyor device suitable for a metal parts production line according to claim 2 is characterized in that: A rotating shaft (8) is movably connected inside the storage shell (7), one end of which passes through the storage shell (7) and the rotating sleeve (601) and is sleeved and fixed with a gear. The rotating shaft (8) is located inside the storage shell (7) and is sleeved with a gear that meshes with the gear sleeved at the end of the universal joint (12).

4. The chain-type suspension conveyor device suitable for a metal parts production line according to claim 3 is characterized in that: A rotating shaft 2 (9) is movably connected to one side of the top of the placement rack (5), a toothed disc (10) is movably connected to the top of the placement rack (5), a stopper (11) is fixed to the top of the toothed disc (10) by spot welding, and a gear is sleeved on the rotating shaft 2 (9) and meshed with the toothed disc (10).

5. The chain-type suspension conveyor device suitable for a metal parts production line according to claim 4, characterized in that: A slider (14) is slidably connected in the limiting groove (606), a spring (15) is sleeved and installed in the limiting groove (606) and on one side of the slider (14), and a connecting rod (16) is movably connected to one side of the slider (14).

6. The chain-type suspension conveyor device suitable for a metal parts production line according to claim 5, characterized in that: The bottom of the placement rack (5) is threadedly connected with a rotating column (18), and the placement rack (5) is slidably connected with a second slider (17). One end of the rotating column (18) is movably connected to the second slider (17), and one end of the connecting rod (16) is movably connected to the outer wall of the second slider (17).

7. The chain-type suspension conveyor device suitable for a metal parts production line according to claim 1, characterized in that: A function plate (19) is fixed to an inner wall of one side of the hanging conveying frame (1) by means of bolts, and a rack 1 (20) and a rack 2 (21) are fixed to one side of the function plate (19) by means of bolts from top to bottom, respectively; the rack 1 (20) is arranged correspondingly to a gear at the end of the rotating shaft 1 (8), and the rack 2 (21) is arranged correspondingly to a gear at the end of the rotating shaft 2 (9).

8. The chain-type suspension conveyor device suitable for a metal parts production line according to claim 7, characterized in that: The chain suspension conveying method suitable for metal parts production lines is: The operator uses a mechanical arm or manual placement operation to place the metal parts on the hook (13) according to the conveyor belt transporting the metal parts, and drives the chain (3) in the hanging conveyor frame (1) to rotate through the driving mechanism (2), and the locking rod (4) on the chain (3) moves to pull the hook (13) on the placement frame (5) to move, thereby realizing the movement of the metal parts; The rack on the inner side of the function plate (19) of the hanging conveyor frame (1) is installed according to the spraying range of the metal parts. When the metal parts enter the spraying area, the gear on the second rotating shaft (9) on the back side of the placement frame (5) contacts the second rack (21) on the function plate (19). The rotation of the second rotating shaft (9) drives the stopper (11) on the gear plate (10) to contact the top column (603) at the bottom of the rotating block (602), causing the rotating sleeve (601) connected to the rotating block (602) to rotate, thereby realizing the swing of the limit column (605) on the side of the swing plate (604). The limit column (605) pushes the hook (13) at the bottom of the universal joint (12) on one side to swing, so that the distance with the universal joint (12) on the other side is increased. As the rotating shaft 2 (9) continues to rotate, the continuously rotating gear disc (10) causes the block (11) to continuously contact the top columns (603) on both sides, causing the swing plate (604) to continuously swing, and continuously driving the metal parts on both sides to rotate during the rotation of the universal joint (12), so that the surface of the metal parts is sprayed more evenly, and at the same time, the rotation collision of metal parts of different sizes is avoided. The rotating column (18) at the bottom of the placement frame (5) is manually rotated, and the rotating column (18) pushes the slider 2 (17) to move upward, and pushes the slider 1 (14) in the limit groove (606) to move through the connecting rod (16), so as to adjust the rotation angle of the single-side rotating sleeve (601) and expand the distance that the limit column (605) pushes the universal joint (12); As the gear on the rotating shaft (8) contacts the rack (20) on the function plate (19), the rotation of the rotating shaft (8) drives the two universal joints (12) located in the storage shell (7) to rotate, so that the two hooks (13) at the ends of the universal joints (12) are separated and rotated at the same time, and the metal parts on the hooks (13) rotate to complete the spraying work.

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