A crank pin surface anti-rust coating spraying device

Abstract

The utility model discloses a kind of crank pin surface antirust coating spraying devices in spraying technical field, including bottom plate and stand, the stand is fixedly installed on the bottom plate upper end one side, operating lever is installed at the top of the stand, motor is installed at one end of the operating lever, motor drive end is connected with rotating frame, four rotating installers are installed at the four corners of the rotating frame, arc fixed frame is connected on the operating lever outside, arc track is connected at the lower end of the arc fixed frame, dryer is installed at the side wall of the stand, spraying frame is installed on the other side of the bottom plate upper end;Through being provided with the rotating frame of four rotating installers, cooperate motor drive, the circulation water operation of four stations can be realized, form semi-automatic production line, greatly improve the efficiency and production capacity of spraying operation, utilize lower pressing rod drive conical head extrusion and expand the block with inclined surface, can be radially expanded support fixed from the inner hole of crank pin.

Description

Technical Field

[0001] This utility model relates to the field of spraying technology, specifically to a device for spraying an anti-rust coating on the surface of a crank pin. Background Technology

[0002] As a key connecting component in rotating machinery such as internal combustion engines and compressors, crank pins are subjected to high load and high speed working environment for a long time. Their surface quality directly affects the transmission efficiency, service life and operational reliability of the equipment. In order to prevent crank pins from rusting during storage and use, it is usually necessary to spray an anti-rust coating on their surface.

[0003] Currently, common spraying methods mostly involve manual hand-held spray gun operation or spraying after fixing with simple clamps. Manual spraying or single-piece operation makes it difficult to achieve continuous batch processing, resulting in low production efficiency, high labor intensity, and poor coating quality due to the significant influence of operator experience. Furthermore, traditional clamps have limited clamping range, making it difficult to adapt to crank pins of different diameters, and they are prone to obstruction during clamping, leading to blind spots in the spraying process. At the same time, the lack of stable and uniform rotation of the workpiece during spraying can easily cause uneven coating thickness, affecting the rust prevention effect. Additionally, drying and curing after spraying often requires separate transfer to an oven or long-term natural air drying, interrupting the continuity of the production process, extending the overall processing cycle, and occupying a large space. Therefore, new technical solutions are needed to address these issues. Utility Model Content

[0004] The purpose of this utility model is to provide a rust-proof coating spraying device for crank pin surfaces, in order to solve the problems mentioned in the background art. These problems include: in the use of existing rust-proof coating spraying devices for crank pin surfaces, manual spraying or single-piece operation makes it difficult to achieve continuous batch processing, resulting in low production efficiency, high labor intensity, and coating quality that is greatly affected by the operator's experience, leading to poor consistency. Furthermore, traditional clamps have a limited clamping range, making it difficult to adapt to crank pins of different diameters, and they are prone to obstruction during clamping, resulting in blind spots in the spraying process. Additionally, the lack of stable and uniform rotation of the workpiece during spraying easily causes uneven coating thickness, affecting the rust-proof effect. Moreover, drying and curing after spraying often requires separate transfer to an oven or long-term natural air drying, interrupting the continuity of the production process, extending the overall processing cycle, and occupying a large area.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rust-proof coating spraying device for crank pin surfaces, comprising a base plate and a column, the column being fixedly installed on one side of the upper end of the base plate, an operating lever being installed at the top of the column, a motor being installed at one end of the operating lever, a rotating frame being connected to the drive end of the motor, four rotating mounters being installed at the four corners of the rotating frame, an arc-shaped fixing frame being connected to the outside of the operating lever, an arc-shaped track being connected to the lower end of the arc-shaped fixing frame, a dryer being installed on the side wall of the column, and a spraying frame being installed on the other side of the upper end of the base plate;

[0006] The spraying frame includes a mounting rod, the bottom end of which is fixedly mounted on the upper end of the base plate. A connecting sleeve is movably fitted onto the upper end of the mounting rod. A bracket is installed on one side of the connecting sleeve. A spray head is installed on the inner wall of the bracket. One end of the spray head is connected to a material pipe.

[0007] As a preferred embodiment of the crank pin surface anti-rust coating spraying device of this utility model, one of the rotary mounters includes a bearing sleeve, the bearing sleeve is fixedly installed on one side of the rotating frame, an operating shaft is installed inside the bearing sleeve, a rubber wheel is installed at the top of the operating shaft, one side of the rubber wheel is in contact with one side of the arc-shaped track, an expander is installed at the bottom of the operating shaft, and a crank pin body is installed on the outside of the expander.

[0008] As a preferred embodiment of the crank pin surface anti-rust coating spraying device of this utility model, the expander includes an operating cavity, which is opened at the lower end of the operating shaft. A fixing ring is fixedly installed at the center of the outer side of the operating shaft. A first spring is provided below the fixing ring. Two operating grooves are opened on both sides of the operating cavity. An operating ring is movably fitted on the outer side of the operating shaft. The operating ring is located below the first spring. A downward pressure rod is movably embedded in the operating cavity. The upper ends of the downward pressure rod movably pass through the two operating grooves and are respectively connected to the inner sides of the operating ring. A conical head is installed at the lower end of the downward pressure rod. Two expansion blocks are movably embedded on both sides of the lower end of the operating cavity.

[0009] As a preferred embodiment of the crank pin surface anti-rust coating spraying device of this utility model, each of the two expansion blocks includes two movable blocks. The two movable blocks are respectively movably embedded in the lower end side walls of the operating cavity. Two inclined plates are installed on the inner walls of the two movable blocks. The side walls of the two inclined plates are respectively attached to the lower end side walls of the conical head. Two second springs are fitted on the outer sides of the two movable blocks. The two second springs are respectively located between the other side of the two inclined plates and the inner wall of the operating cavity.

[0010] As a preferred embodiment of the crank pin surface anti-rust coating spraying device of this utility model, the dryer includes a hot air blower, which is fixedly installed at the center of the side wall of the column, and a blower head is installed at the center of the other side of the column, and the blower head is connected to the hot air blower.

[0011] As a preferred embodiment of the crank pin surface anti-rust coating spraying device of this utility model, the bracket is an L-shaped bracket.

[0012] As a preferred embodiment of the crank pin surface anti-rust coating spraying device of this utility model, the connection position between the operating rod and the column is provided with a reinforcing rib.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the setting of the anti-rust coating spraying device for crank pin surface has a reasonable structural design;

[0014] By setting up a rotating frame with four rotary mounters and cooperating with a motor drive, a four-station cyclical flow operation can be realized, forming a semi-automated production line, which greatly improves the efficiency and production capacity of the spraying operation. The tapered head driven by the pressure rod extrudes the expansion block with the inclined surface, which can radially expand and support the crank pin from the inner hole. It not only clamps firmly without damaging the outer surface, but also has a certain self-adjusting capability through the cooperation of the first spring, the second spring and the movable block. It can be compatible with crank pins of different hole diameters within a certain size range, and has good versatility.

[0015] The rotating frame drives the crank pin body to rotate at a uniform speed, while the nozzle is positioned by the bracket and the adjustable height connecting sleeve. This allows for precise and stable all-around spraying of the rotating workpiece, effectively avoiding uneven coating, drips, or missed spraying, and ensuring the uniformity and consistency of the coating quality. At the same time, the installed dryer provides immediate hot air drying for the sprayed crank pin, achieving close integration and even partial synchronization of the spraying and drying processes. This significantly shortens the coating curing time, speeds up the production cycle, and reduces workpiece turnover and space occupation. Attached Figure Description

[0016] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 This is a rear-view three-dimensional structural diagram of the present invention;

[0018] Figure 3 This is a three-dimensional structural diagram of the rotary mounter of this utility model;

[0019] Figure 4 This is a cross-sectional view of the rotary mounter of this utility model.

[0020] In the diagram: 1. Base plate, 2. Column, 3. Operating lever, 4. Motor, 5. Rotating frame, 6. Arc-shaped fixing frame, 7. Arc-shaped track, 8. Mounting rod, 9. Connecting sleeve, 10. Bracket, 11. Nozzle, 12. Material pipe, 13. Bearing sleeve, 14. Operating shaft, 15. Rubber wheel, 16. Crank pin body, 17. Operating cavity, 18. Fixing ring, 19. First spring, 20. Operating groove, 21. Operating ring, 22. Downward pressure rod, 23. Conical head, 24. Moving block, 25. Inclined plate, 26. Second spring, 27. Hot air blower, 28. Air blower head, 29. Reinforcing rib. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution: In this technical solution, a rust-proof coating spraying device for crank pin surface includes a base plate 1 and a column 2. The column 2 is fixedly installed on one side of the upper end of the base plate 1. An operating rod 3 is installed at the top of the column 2. A motor 4 is installed at one end of the operating rod 3. A rotating frame 5 is connected to the drive end of the motor 4. Four rotating mounts are installed at the four corners of the rotating frame 5. An arc-shaped fixing frame 6 is connected to the outside of the operating rod 3. An arc-shaped track 7 is connected to the lower end of the arc-shaped fixing frame 6. A dryer is installed on the side wall of the column 2. A spraying frame is installed on the other side of the upper end of the base plate 1.

[0023] In this technical solution, when performing surface spraying on crank pins, the operator first moves the device to a designated position, supports it with a base plate 1, and connects it to a designated control system. Then, the crank pins to be treated are sequentially installed at the lower ends of four rotary mounters. The motor 4 on one side of the operating lever 3 then slowly rotates, driving the rotating frame 5 and the four rotary mounters to rotate slowly. This causes the four rotary mounters to rotate sequentially to the spraying rack and dryer positions, where the crank pins at the lower ends of the rotary mounters are sprayed and dried. This achieves close integration and even partial synchronization of the spraying and drying processes, significantly shortening the coating curing time, accelerating the production cycle, and reducing workpiece turnover and space occupation. Furthermore, when the rotary mount rotates to the underside of the arc-shaped fixed frame 6, one top side of the rotary mount contacts the side wall of the arc-shaped track 7. Under friction, the rotary mount can rotate autonomously, allowing the spraying rack and dryer to perform comprehensive treatment of the crank pins.

[0024] In some technical solutions, reference Figure 1 The spraying frame includes a mounting rod 8, the bottom end of which is fixedly installed on the upper end of the base plate 1. A connecting sleeve 9 is movably fitted on the upper end of the mounting rod 8. A bracket 10 is installed on one side of the connecting sleeve 9. A spray nozzle 11 is installed on the inner wall of the bracket 10. One end of the spray nozzle 11 is connected to a material pipe 12.

[0025] In this technical solution, when spraying the crank pin, the rotating frame 5 rotates with the motor 4 to move the crank pin installed at the lower end of the rotary mount to the inside of the bracket 10. Then, the spray paint delivered through the material pipe 12 enters the nozzle 11 and is then evenly sprayed onto the outer surface of the crank pin through the nozzle 11, ensuring the overall uniformity of the crank pin spraying. Furthermore, the height of the connecting sleeve 9 at the upper end of the mounting rod 8 can be adjusted by turning the bolt on one side through the movable connecting sleeve 9, so as to meet the processing requirements of crank pins of different specifications.

[0026] In some technical solutions, reference Figure 1 One of the rotary mounters includes a bearing sleeve 13, which is fixedly mounted on one side of the rotating frame 5. An operating shaft 14 is installed inside the bearing sleeve 13. A rubber wheel 15 is installed at the top of the operating shaft 14. One side of the rubber wheel 15 is in contact with one side of the arc-shaped track 7. An expander is installed at the bottom of the operating shaft 14. A crank pin body 16 is installed on the outside of the expander.

[0027] In this technical solution, when spraying the crank pin, the operator first places the crank pin body 16 to be processed on the outside of the expander at the bottom of the operating shaft 14. The expander actively fixes the crank pin body 16. Then, the motor 4 and the rotating frame 5 work together to drive the bearing sleeve 13 and the operating shaft 14 to move horizontally. The rubber wheel 15 at the top of the operating shaft 14 fits against the arc-shaped track 7. As the rotating installer moves, the operating shaft 14 rotates within the bearing sleeve 13, ensuring the all-round processing effect of the spraying frame and the dryer on the crank pin body 16.

[0028] In some technical solutions, reference Figure 1 The expander includes an operating cavity 17, which is located at the lower end of the operating shaft 14. A fixing ring 18 is fixedly installed at the center of the outer side of the operating shaft 14. A first spring 19 is provided below the fixing ring 18. Two operating slots 20 are provided on both sides of the operating cavity 17. An operating ring 21 is movably fitted on the outer side of the operating shaft 14. The operating ring 21 is located below the first spring 19. A pressing rod 22 is movably embedded in the operating cavity 17. The upper ends of the pressing rod 22 movably pass through the two operating slots 20 and are respectively connected to the inner sides of the operating ring 21. A conical head 23 is installed at the lower end of the pressing rod 22. Two expansion blocks are movably embedded on both sides of the lower end of the operating cavity 17.

[0029] In this technical solution, when installing the crank pin body 16, the operator first places the crank pin body 16 to be processed onto the lower end of the operating shaft 14, and then contacts the lower end of the operating ring 21 through the upper wall surface of the crank pin body 16. The operating ring 21 is then lifted, causing the pressure rod 22 on the inner wall of the operating ring 21 to move upward within the two operating grooves 20 until the tapered head 23 at the lower end of the pressure rod 22 separates from the two expansion blocks. The two expansion blocks retract into the side walls of the operating cavity 17 under the restoring action of the spring, until the crank pin body 16 is completely fitted onto the bottom end of the operating shaft 14. Then, the crank pin is released. The crank pin body 16, crank pin body 16, and operating ring 21 move downward under the reset action of the first spring 19. At the same time, the pressure rod 22 on the inner side of the operating ring 21 moves downward synchronously until the conical head 23 is embedded between the two expansion blocks. The conical head 23 pushes the two expansion blocks to move outward until the two expansion blocks contact the inner walls on both sides of the crank pin body 16, thus expanding and fixing the crank pin body 16. When it is necessary to disassemble the crank pin body 16, simply lift the operating ring 21 upward to allow the two expansion blocks to retract automatically, releasing the expansion and fixing of the crank pin body 16, and completing the disassembly of the crank pin body 16.

[0030] In some technical solutions, reference Figure 1 Each of the two expansion blocks includes two movable blocks 24, which are respectively movably embedded in the lower side walls of the operating cavity 17. Two inclined plates 25 are installed on the inner walls of the two movable blocks 24, and the side walls of the two inclined plates 25 are respectively attached to the lower sides of the conical head 23. Two second springs 26 are fitted on the outer side of the two movable blocks 24, and the two second springs 26 are respectively located between the other side of the two inclined plates 25 and the inner wall of the operating cavity 17.

[0031] In this technical solution, when the conical block moves upward with the downward pressure rod 22, the two sides of the lower end of the conical block separate from the two inclined plates 25. At the same time, under the reset action of the two second springs 26, the two inclined plates 25 and the two movable blocks 24 move towards the center, so that the crank pin body 16 can be disassembled and assembled. When the downward pressure rod 22 moves downward with the operating ring 21, the two sides of the conical head 23 contact the two inclined plates 25. Under the cooperation of the conical head 23 and the inclined surfaces of the inclined plates 25, the two inclined plates 25 and the two movable blocks 24 are pushed outward to expand and fix the crank pin body 16, while squeezing the second springs 26.

[0032] In some technical solutions, reference Figure 1 The dryer includes a hot air blower 27, which is fixedly installed at the center of the side wall of the column 2. A blower head 28 is installed at the center of the other side of the column 2, and the blower head 28 is connected to the hot air blower 27.

[0033] In this technical solution, when the crank pin body 16 is sprayed and dried, the hot air blower 27 on one side of the column 2 is used to transport and heat the gas, and then blow it out through the blower head 28 to dry the sprayed crank pin body 16.

[0034] In some technical solutions, reference Figure 1 The bracket 10 is an L-shaped bracket 10.

[0035] In this technical solution, it is convenient to spray the bottom and sidewalls of the crank pin body 16.

[0036] In some technical solutions, reference Figure 1 The connection between the operating lever 3 and the column 2 is provided with a reinforcing rib 29.

[0037] In this technical solution, the connection strength between the operating lever 3 and the column 2 is guaranteed.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A device for spraying an anti-rust coating on the surface of a crank pin, comprising a base plate (1) and a column (2), characterized in that, The column (2) is fixedly installed on one side of the upper end of the base plate (1). An operating rod (3) is installed at the top of the column (2). A motor (4) is installed at one end of the operating rod (3). A rotating frame (5) is connected to the driving end of the motor (4). Four rotating mounts are installed at the four corners of the rotating frame (5). An arc-shaped fixing frame (6) is connected to the outside of the operating rod (3). An arc-shaped track (7) is connected to the lower end of the arc-shaped fixing frame (6). A dryer is installed on the side wall of the column (2). A spraying frame is installed on the other side of the upper end of the base plate (1). The spraying frame includes a mounting rod (8), the bottom end of which is fixedly installed on the upper end of the base plate (1). A connecting sleeve (9) is movably fitted on the upper end of the mounting rod (8). A bracket (10) is installed on one side of the connecting sleeve (9). A nozzle (11) is installed on the inner wall of the bracket (10). One end of the nozzle (11) is connected to a material pipe (12).

2. The anti-rust coating spraying device for crank pin surface according to claim 1, characterized in that, One of the rotary mounters includes a bearing sleeve (13), which is fixedly mounted on one side of the rotating frame (5). An operating shaft (14) is installed inside the bearing sleeve (13). A rubber wheel (15) is installed at the top of the operating shaft (14). One side of the rubber wheel (15) is in contact with one side of the arc-shaped track (7). An expander is installed at the bottom of the operating shaft (14). A crank pin body (16) is installed on the outside of the expander.

3. The anti-rust coating spraying device for crank pin surface according to claim 2, characterized in that, The expander includes an operating cavity (17), which is located at the lower end of the operating shaft (14). A fixing ring (18) is fixedly installed at the center of the outer side of the operating shaft (14). A first spring (19) is provided below the fixing ring (18). Two operating slots (20) are opened on both sides of the operating cavity (17). An operating ring (21) is movably fitted on the outer side of the operating shaft (14). The operating ring (21) is located below the first spring (19). A pressing rod (22) is movably embedded in the operating cavity (17). The upper ends of the pressing rod (22) are movably inserted through the two operating slots (20) and connected to the inner sides of the operating ring (21). A conical head (23) is installed at the lower end of the pressing rod (22). Two expansion blocks are movably embedded on both sides of the lower end of the operating cavity (17).

4. The anti-rust coating spraying device for crank pin surface according to claim 3, characterized in that, Each of the two expansion blocks includes two movable blocks (24). The two movable blocks (24) are respectively movably embedded in the lower two side walls of the operating cavity (17). Two inclined plates (25) are installed on the inner walls of the two movable blocks (24). The side walls of the two inclined plates (25) are respectively attached to the lower two sides of the cone head (23). Two second springs (26) are fitted on the outer side of the two movable blocks (24). The two second springs (26) are respectively located between the other side of the two inclined plates (25) and the inner wall of the operating cavity (17).

5. The anti-rust coating spraying device for crank pin surface according to claim 1, characterized in that, The dryer includes a hot air blower (27), which is fixedly installed at the center of the side wall of the column (2). A blower head (28) is installed at the center of the other side of the column (2), and the blower head (28) is connected to the hot air blower (27).

6. The anti-rust coating spraying device for crank pin surface according to claim 1, characterized in that, The bracket (10) is an L-shaped bracket.

7. The anti-rust coating spraying device for crank pin surface according to claim 1, characterized in that, The operating lever (3) is provided with a reinforcing rib (29) at the connection position with the column (2).

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