A rotary metering spray device

Abstract

The utility model relates to the technical field of automobile parts production, and disclose a rotary quantitative spraying device, include: guide rail, a side of guide rail is provided with a plurality of gear that can be along its radial linear displacement and rotation, the detachable installation of gear has the clamping structure for fixing work piece, and the clamping structure includes clamping seat, backplate and dog claw, backplate fixed mounting is at one side of clamping seat, the other side of clamping seat is equipped with clamp, and the opposite two side wall surfaces of backplate all are installed with the dog claw of deformable, will clamping seat detachable installation in a side of gear, this design every clamping seat can be individually taken down and clamps work piece with the help of clamp, then in the linear displacement and rotation process of gear, clamping seat will keep and the linear and rotation movement of gear synchronization, and the multiple parts clamped and fixed in one side of clamping seat can be even sprayed by spray gun, reduce the dead angle of spraying, and the clamping seat that moves to the side of spray gun can be taken down to realize feeding, help to promote production efficiency, shorten the waiting interval.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing technology, and in particular to a rotary quantitative spraying device. Background Technology

[0002] The production process of automotive parts requires painting the surface of the parts.

[0003] A search revealed a prior art device for a parts tray-type conveying system used in automotive component production (Announcement No.: CN114558724B), comprising: a conveying support beam; a parts rotation transmission mechanism disposed at the rear of the indexing tray, wherein a rotation drive component drives a parts fixing tray to rotate via the parts rotation transmission mechanism; clamping blocks arranged in a radial circumferential array and slidably connected to the front end face of the parts fixing tray; and a clamping transmission mechanism disposed inside the parts fixing tray, wherein a clamping operation component drives the clamping blocks to slide via the clamping transmission mechanism.

[0004] Existing technology uses a synchronous belt to make the rotating plate move linearly and a motor to make the fixed plate of the rotating parts rotate intermittently. However, in actual production, after the workpiece on the fixed plate is painted, the machine needs to be stopped for loading and unloading operations, which limits the production efficiency and production continuity, and there is room for optimization.

[0005] Therefore, we propose a rotary quantitative spraying device. Utility Model Content

[0006] The present invention mainly addresses the technical problems of limited production continuity and efficiency by providing a rotary quantitative spraying device.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a rotary quantitative spraying device, comprising: The guide rail has several gears on one side that can linearly displace and rotate along its radial direction. The gears are detachably mounted with a clamping structure for fixing the workpiece. The clamping structure includes a clamping seat, a back plate, and jaws. The back plate is fixedly mounted on one side of the clamping seat, and a clamp is provided on the other side of the clamping seat. Deformable jaws are installed on both opposite side walls of the back plate. The back plate is detachably connected to the gears through the jaws.

[0008] In a preferred embodiment of this utility model, the clamping structure further includes a mounting base, a slot, and an anti-disengagement hole. The mounting base is welded and fixed to the gear. A slot is provided at the end of the mounting base, and an anti-disengagement hole is provided on the inner side wall of the slot. The claw can engage with the anti-disengagement hole to lock the back plate.

[0009] In a preferred embodiment of this utility model, the back plate is a rectangular block, the slot forms a rectangular groove that fits the back plate with a clearance, the clamp is a circular plate, and the back plate and the clamp are integrally formed.

[0010] In a preferred embodiment of this utility model, the claw is an L-shaped elastic steel plate, one side of the claw is provided with a circular protrusion, and the anti-disengagement hole is a circular hole, with the protrusion and the anti-disengagement hole working together.

[0011] In a preferred embodiment of this utility model, the front wall of the guide rail is provided with a groove, the back of the gear is provided with a slider, the slider is slidably disposed in the groove, the gear is rotatably connected to the slider, and the top of the guide rail is provided with a rack, the gear meshing with the rack.

[0012] In a preferred embodiment of this utility model, the rack is locked and fixed to the guide rail by bolts, and the bottom of the rack has a toothed opening, with the gear meshing with the bottom of the rack.

[0013] In a preferred embodiment of this utility model, a servo motor is fixedly installed at the bottom of the guide rail, a synchronous belt is provided at the bottom of the guide rail, the slider is fixedly installed with the synchronous belt, and the synchronous belt is driven to linear displacement by the servo motor.

[0014] This invention provides a rotary metering spraying device. It has the following advantages: 1. This rotary quantitative spraying device, by setting a gear that can be linearly displaced and rotated, allows the clamps to be detached and installed on one side of the gear. In this design, each clamp can be removed individually and used to clamp the workpiece, such as plastic parts for interior decoration. Taking the clamp as an example, during the linear displacement and rotation of the gear, the clamp will maintain a linear and rotational movement synchronized with the gear. Multiple parts clamped and fixed on one side of the clamp can be evenly sprayed by the spray gun, reducing spray dead angles. By removing the clamp that has moved to the side of the spray gun, loading and unloading can be achieved, which helps to improve production efficiency and shorten the waiting period.

[0015] 2. This rotary quantitative spraying device allows for easy disassembly and assembly of the clamping unit when the clamping unit needs to be removed. Two symmetrically arranged clamping claws are pinched with two fingers, causing the claws to deform and retract into the notch on the side wall of the back plate. The protrusions of the claws then detach from the anti-detachment hole, allowing the clamping unit to be removed. This facilitates the disassembly and assembly of the clamping unit for loading and unloading operations.

[0016] 3. This rotary quantitative spraying device connects a gear to a slider shaft and meshes with a rack and pinion. The gear can rotate as it moves linearly with the slider. This design allows the parts on one side of the clamp to rotate during linear movement, thereby improving the spraying quality, reducing dead angles, and facilitating alternating loading and unloading. Attached Figure Description

[0017] Figure 1 This is one of the overall perspective views of this utility model; Figure 2 This is the second overall perspective view of the present utility model; Figure 3 This is a perspective view of the gear and mounting base of this utility model; Figure 4 This is a side perspective view of the clamping base of this utility model; Figure 5 This is a rear perspective view of the clamp of this utility model; Figure 6 This is a schematic diagram of the backplate and the claw.

[0018] Legend: 10. Guide rail; 11. Gear; 12. Synchronous belt; 13. Servo motor; 14. Rack; 15. Slider; 16. Mounting base; 17. Slot; 18. Anti-detachment hole; 20. Clamp; 21. Back plate; 22. Claw. Detailed Implementation

[0019] A rotary metering spraying device, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, it includes: The guide rail 10 has several gears 11 on one side that can linearly displace and rotate along its radial direction. Each gear 11 is detachably mounted with a clamping structure for fixing the workpiece. The clamping structure includes a clamping seat 20, a back plate 21, and jaws 22. The back plate 21 is fixedly mounted on one side of the clamping seat 20, and a clamp is provided on the other side of the clamping seat 20. Deformable jaws 22 are mounted on both opposite side walls of the back plate 21. The back plate 21 is detachably connected to the gears 11 via the jaws 22. The clamping structure also includes a mounting base 16, a slot 17, and a locking mechanism. Hole 18, mounting base 16 is welded and fixed to gear 11, mounting base 16 has a slot 17 at the end, the inner side wall of slot 17 has a locking hole 18, the claw 22 can engage with the locking hole 18 to lock back plate 21, back plate 21 is a rectangular block, slot 17 forms a rectangular groove that fits the back plate 21 with clearance, clamp 20 is a circular plate, back plate 21 and clamp 20 are integrally formed, claw 22 is an L-shaped elastic steel plate, one side of claw 22 has a circular protrusion, locking hole 18 is a circular hole, the protrusion and locking hole 18 are used in conjunction with each other; Specifically, a mounting base is welded to the back of the guide rail 10, which can be used to fix the guide rail 10 to the frame. At the same time, a spray gun for painting should also be installed on the frame. By setting a linearly displaceable and rotatable gear 11, the clamp 20 can be disassembled and installed on one side of the gear 11. With this design, each clamp 20 can be removed individually and clamped with a clamp, such as plastic parts for interior decoration. Taking the clamp as an example, during the linear displacement and rotation of the gear 11, the clamp 20 will maintain a linear and rotational movement synchronized with the gear 11. Multiple parts clamped and fixed on one side of the clamp 20 can be evenly sprayed by the spray gun, reducing spray dead corners. By removing the clamp 20 that has moved to the side of the spray gun, loading and unloading can be realized, which helps to improve production efficiency and shorten the waiting time.

[0020] When it is necessary to disassemble the clamp 20, pinch the two symmetrically arranged jaws 20 with two fingers. The jaws 20 will deform and retract into the notch on the side wall of the back plate 21. The protrusion of the jaw 22 will disengage from the anti-disengagement hole 18. Then, the clamp 20 can be pulled off, which makes it convenient to disassemble and assemble the clamp 20 for loading and unloading operations.

[0021] like Figure 2 and Figure 3 As shown, the front wall of the guide rail 10 is provided with a sliding groove, the back of the gear 11 is provided with a slider 15, the slider 15 is slidably disposed in the sliding groove, the gear 11 and the slider 15 are rotatably connected, the top of the guide rail 10 is provided with a rack 14, the gear 11 and the rack 14 mesh, the rack 14 is locked and fixed to the guide rail 10 by bolts, the bottom of the rack 14 is provided with a toothed opening, the bottom of the gear 11 and the rack 14 mesh, the bottom of the guide rail 10 is fixedly installed with a servo motor 13, the bottom of the guide rail 10 is provided with a synchronous belt 12, the slider 15 is fixedly installed with the synchronous belt 12, and the synchronous belt 12 is driven by the servo motor 13 to perform linear displacement. In this design, to achieve linear motion and rotation of gear 11, a synchronous belt is fixedly installed on the output shaft of servo motor 13. Another synchronous pulley is rotatably connected to the bottom of guide rail 10. Both synchronous pulleys mesh with synchronous belt 12. By locking slider 15 and synchronous belt 12 with bolts, linear displacement of slider 15 can be achieved by synchronous belt 12 driving slider 15. Gear 11 will then move linearly with slider 15. By connecting gear 11 and slider 15 to a shaft and engaging rack 14 with gear 11, gear 11 can rotate during linear displacement with slider 15. This design allows parts on one side of clamp 20 to rotate during linear motion, thereby improving coating quality, reducing dead angles, and facilitating alternating loading and unloading. Servo motor needs to be connected to a controller.

[0022] The working principle of this utility model is as follows: When it is necessary to disassemble the clamp 20, pinch the two symmetrically arranged grippers 22 with two fingers. The grippers 22 deform and retract into the notch on the side wall of the back plate 21. The protrusion of the grippers 22 disengages from the anti-disengagement hole 18, and the clamp 20 can be removed. The workpiece is clamped on the fixture on one side of the clamp 20 and the clamp 20 is reassembled. The output shaft of the servo motor 13 is fixedly mounted with a synchronous belt. The bottom of the guide rail 10 is rotatably connected to another synchronous pulley. Both synchronous pulleys are engaged with the synchronous belt 12. The slider 15 is locked to the synchronous belt 12 with bolts to realize the synchronous belt 12 driving the slider. When block 15 moves linearly, gear 11 will move linearly with block 15. By connecting gear 11 to block 15 and engaging rack 14 with gear 11, gear 11 can rotate during linear displacement with block 15. A mounting base is welded to the back of guide rail 10, which can be used to fix guide rail 10 to the frame. At the same time, a spray gun for painting should also be installed on the frame. Clamp 20 will maintain linear and rotational movement synchronized with gear 11. Multiple parts clamped and fixed on one side of clamp 20 can be evenly sprayed by the spray gun, realizing rotational spraying of workpieces.

[0023] Metering pump selection: A precision gear pump driven by a servo motor (such as an internal gear pump with an accuracy of ±0.5%) is used. Its displacement per revolution is fixed, and the output paint volume can be precisely controlled by adjusting the servo motor's revolutions. The pump body should be corrosion-resistant (e.g., 316L stainless steel or PVDF material), compatible with common solvent-based and water-based paints. Independent control of atomization pressure and fan pressure: High-precision dual pressure regulators (e.g., 0.01MPa adjustment accuracy) are provided for each spray gun. Atomization pressure and fan pressure can be independently set and closed-loop controlled on the human-machine interface (HMI) according to the geometry of different workpieces and paint characteristics. Flow valve and color-changing system: High-speed response switching valves (response time <10ms) and high-precision flow sensors (such as Coriolis mass flow meters) are installed on each paint pipeline for real-time monitoring and precise control of paint on / off and flow rate for each spray gun. Multi-color color-changing modules (such as 16-color color-changing valves) can be integrated to reduce color-changing cleaning time and paint waste.

[0024] The servo motor 13 driving the synchronous belt 12 should be a model with low inertia and high torque density (rated speed 3000rpm, rated torque sufficient to overcome system resistance), and equipped with an absolute encoder (multi-turn) to ensure that position information is not lost after power failure, and to achieve accurate positioning. Motion control profile: In order to avoid paint accumulation (paint piling) or excessive thinness during the spraying start and stop phases, the movement of the slider 15 should adopt an S-shaped acceleration and deceleration curve rather than a simple uniform or trapezoidal acceleration and deceleration. The controller plans a smooth speed curve to ensure that the gear 11 accelerates and decelerates smoothly at the beginning and end of the stroke, while being precisely synchronized with the switch signal of the spray gun.

[0025] Synchronous Belt 12 Selection and Tensioning: A high-precision synchronous belt (such as the MXL type) with a rubber core, polyurethane coating, and steel wire reinforcement should be selected for synchronous belt 12 to reduce elongation. An automatic tensioning mechanism (such as a spring-loaded tensioning wheel) should be installed to ensure the synchronous belt is always in optimal tension, preventing slippage or tooth skipping and ensuring transmission accuracy. Position Feedback and Compensation: Configuring an encoder only at the servo motor end constitutes semi-closed-loop control. To further improve the actual position accuracy of the slider 15, a high-precision linear magnetic scale (1μm resolution) can be added next to the guide rail 10 as a fully closed-loop feedback mechanism to compensate for errors caused by synchronous belt elastic deformation and wear in real time.

[0026] It is recommended that gear 11 be a helical gear, and rack 14 be a corresponding helical rack. Compared with spur gears, this results in smoother transmission, lower noise, and higher load-bearing capacity. Meshing backlash can be eliminated through a preload device or double-gear backlash elimination technology to avoid idle stroke during reverse rotation, which would affect the accuracy of the rotation angle. Rotation-linear motion correlation control: To ensure that the surface linear velocity of the workpiece matches the spraying rate when it passes through the spray gun, the controller needs to accurately calculate the ratio of the rotational speed to the linear velocity of gear 11.

[0027] The entire guide rail area 10 is equipped with a sealed or semi-sealed spraying chamber (a transparent PVC curtain can be used), and a slight negative pressure (-5Pa ~ -15Pa) is maintained inside the chamber to prevent paint mist from escaping.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A rotary metering spraying device, characterized in that, include: A guide rail (10) is provided on one side, and a number of gears (11) are provided that can be linearly displaced and rotated along its radial direction. The gears (11) are detachably mounted with a clamping structure for fixing the workpiece. The clamping structure includes a clamping seat (20), a back plate (21) and a claw (22). The back plate (21) is fixedly mounted on one side of the clamping seat (20), and a clamp is provided on the other side of the clamping seat (20). Deformable claws (22) are installed on both opposite side walls of the back plate (21). The back plate (21) is detachably connected to the gears (11) through the claws (22).

2. The rotary quantitative spraying device according to claim 1, characterized in that: The clamping structure also includes a mounting base (16), a slot (17), and a locking hole (18). The mounting base (16) is welded and fixed to the gear (11). The mounting base (16) has a slot (17) at its end and a locking hole (18) on its inner sidewall. The claw (22) can engage with the locking hole (18) to lock the back plate (21).

3. The rotary quantitative spraying device according to claim 2, characterized in that: The back plate (21) is a rectangular block, the slot (17) forms a rectangular groove that fits the back plate (21) with a clearance, the clamp (20) is a circular plate, and the back plate (21) and the clamp (20) are integrally formed.

4. The rotary quantitative spraying device according to claim 2, characterized in that: The claw (22) is an L-shaped elastic steel plate. A circular protrusion is provided on one side of the claw (22). The anti-disengagement hole (18) is a circular hole. The protrusion and the anti-disengagement hole (18) are used in conjunction with each other.

5. The rotary quantitative spraying device according to claim 1, characterized in that: The front wall of the guide rail (10) is provided with a sliding groove, and the back of the gear (11) is provided with a slider (15). The slider (15) is slidably disposed in the sliding groove. The gear (11) and the slider (15) are rotatably connected. The top of the guide rail (10) is provided with a rack (14), and the gear (11) meshes with the rack (14).

6. The rotary quantitative spraying device according to claim 5, characterized in that: The rack (14) is locked and fixed to the guide rail (10) by bolts. The bottom of the rack (14) has a toothed opening, and the gear (11) meshes with the bottom of the rack (14).

7. The rotary quantitative spraying device according to claim 5, characterized in that: A servo motor (13) is fixedly installed at the bottom of the guide rail (10), and a synchronous belt (12) is provided at the bottom of the guide rail (10). The slider (15) is fixedly installed with the synchronous belt (12), and the synchronous belt (12) is driven to linear displacement by the servo motor (13).

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