High speed electrostatic spinning cup for robot

Abstract

The utility model provides a kind of high-speed electrostatic rotary cup for manipulator, belong to the field of automatic spraying technology, including shell body, further include: air spray cover, screw thread is connected in the top of shell body, and only be provided with spray hole on the top of air spray cover and inside wall, mounting seat, is installed in the top of motor rotating shaft, dismounting structure, is arranged in the outside of mounting seat, gas guide structure, is arranged in the outside of driving motor.In the utility model, by push-pull electromagnet energization pull down sliding ring, reset spring is compressed, so that fixed bead is withdrawn from the recess of cup cap, the locking of cup cap is released, cup cap can be removed and replaced, whereby the device is easily replaced function, cup cap can be quickly replaced to greatly shorten equipment downtime, ensure the continuous operation of automatic spraying line, improve production efficiency, simplify replacement process can reduce professional tool dependence, ordinary operator can complete.

Description

Technical Field

[0001] This utility model relates to the field of automated spraying technology, specifically to a high-speed electrostatic rotary cup for a robotic arm. Background Technology

[0002] In the field of industrial automated spraying, traditional spraying is inefficient and produces poor coating uniformity. High-speed electrostatic rotary cups for robotic arms have emerged to address this issue. By leveraging the flexibility of robotic arms and the centrifugal atomization and electrostatic adsorption principles of high-speed electrostatic rotary cups, automated and precise spraying of complex workpieces can be achieved, significantly improving spraying efficiency and coating quality. They are widely used in automated coating production lines in industries such as automobiles and home appliances.

[0003] A Chinese patent application with application number 202220334529.7 discloses a magnetically levitated high-speed electrostatic spraying rotary cup, including a levitation sleeve. The outer surface of the levitation sleeve is engraved with external threads. An air distributor is disposed above the levitation sleeve, and an air forming cover is disposed above the air distributor. A rotary cup clamping sleeve is disposed above the air forming cover. The internal thread of the rotary cup clamping sleeve is provided with internal threads, which cooperate with the external threads of the levitation sleeve. The air distributor has a groove inside. This utility model relates to the field of high-speed rotary cup technology. This magnetically levitated high-speed electrostatic spraying rotary cup uses a threaded locking method between the levitation sleeve and the rotary cup clamping sleeve to press the air distributor and the air forming cover together, eliminating the need for hole alignment and saving the trouble of screw hole alignment and screw tightening. In addition, by setting multiple heat dissipation holes, the overall heat dissipation of the rotary cup is effectively improved, making it highly practical.

[0004] The aforementioned patent still has the following shortcomings: During long-term use, the cup cap is prone to atrophy and spraying accuracy due to wear and tear, paint particle blockage, etc. Therefore, it needs to be replaced regularly. However, due to the complexity of cup cap replacement in frequent spraying operations, professional tools or personnel are required, which increases maintenance costs and makes it difficult to replace worn cup caps in time. This can lead to a continuous deterioration of atrophy, a decline in coating quality, and an increase in the defect rate. Utility Model Content

[0005] This invention provides a high-speed electrostatic rotary cup for robotic arms, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] An embodiment of this utility model provides a high-speed electrostatic rotary cup for a robotic arm, including an outer shell and further comprising:

[0008] An air spray cap is threaded to the top of the outer casing, and the top and inner wall of the air spray cap are only provided with spray holes.

[0009] A drive motor is installed inside the housing, and a motor shaft is installed inside the drive motor. A connecting pipe is fixed inside the motor shaft, and an insulating support is installed at the top of the drive motor.

[0010] The mounting base is installed on the top of the motor shaft, and a cup cap is fitted on the top of the mounting base, and a paint outlet cover is installed inside the cup cap;

[0011] The mounting structure is located on the outside of the mounting base. The mounting structure includes a sleeve fixed on the outside of the mounting base, a movable ring slidably connected to the outside of the sleeve, a return spring installed between the sleeve and the movable ring, a fixing bead slidably connected inside the sleeve, a positioning groove opened at the top of the inside of the movable ring, and a movable component located on the outside of the movable ring.

[0012] An air-guiding structure, located on the outside of the drive motor, is used to guide airflow to cool the drive motor.

[0013] The above technical solution uses a drive motor to provide centrifugal force to the cup cap, which atomizes the paint into fine particles. Compressed air is then introduced into the air spray cap through the air guide structure and sprayed out through the nozzles on the top and inner wall of the air spray cap, further refining the paint particles and controlling the spray direction and range of the paint mist.

[0014] Furthermore, a paint inlet pipe is installed inside the top of the outer shell, and a rotary joint is installed between the paint inlet pipe and the connecting pipe. An air inlet pipe is installed on one side of the top of the outer shell, and a connecting frame is installed on the outer side of the bottom of the outer shell by bolts, and a mounting plate is fixed to the bottom of the connecting frame.

[0015] Through the above technical solution, the paint inlet pipe, in conjunction with the rotary joint, ensures that the paint can still be stably delivered when the motor shaft rotates at high speed, avoiding paint leakage and delivery interruption. The air inlet pipe supplies air to the drive motor and air spray cap, ensuring the rotation power of the rotary cup and the control of paint mist. The connecting frame and mounting plate are fixed by bolts, which makes it easy to securely install the rotary cup on the robot arm and realize flexible and precise spraying operations.

[0016] Furthermore, the moving assembly includes a bearing fixed to the outside of the moving ring, a moving seat mounted on the outside of the bearing, and a push-pull electromagnet mounted inside the insulating support base and connected to the moving seat at its moving end.

[0017] The above technical solution involves energizing a push-pull electromagnet to pull the moving ring downwards, compressing the return spring, and causing the fixing bead to exit the groove of the cup cap, thus releasing the lock on the cup cap. After replacement, the push-pull electromagnet is de-energized, and the return spring pushes the moving ring upwards, causing the inclined surface of the positioning groove to press the fixing bead again, making it enter the groove on the outer wall of the cup cap, and firmly locking the cup cap on the mounting base. The presence of the sealing ring prevents paint leakage and ensures the sealing performance of the device. This enables rapid replacement of the cup cap, shortens equipment downtime to a certain extent, and improves production efficiency.

[0018] Furthermore, the insert and the cup cap form an insertion and removal structure, and a sealing ring that contacts the cup cap is fixed on the inner wall of the insert.

[0019] Through the above technical solution, the sleeve and the cup cap form a plug-in structure, which, together with the inner wall sealing ring, enables quick loading and unloading while effectively preventing paint leakage, ensuring a clean spraying environment and high paint utilization rate. The sealing ring fits tightly against the cup cap, which to a certain extent improves the sealing performance and reliability of the device.

[0020] Furthermore, the fixing beads are arranged in a ring at equal intervals inside the insert, and the outer wall of the cup cap is provided with a groove that matches the fixing beads. The positioning groove has a funnel-shaped inclined structure in frontal cross-section.

[0021] Through the above technical solution, the fixed beads are arranged in a ring with equal spacing, which precisely matches the groove of the cup cap to ensure a stable and wobbly lock. The funnel-shaped inclined structure of the positioning groove can accurately resist the movement of the fixed beads when the moving ring is raised and lowered.

[0022] Furthermore, the air guiding structure includes an air intake shell fixed inside the bottom of the outer casing and connected to the air intake pipe, a flow equalization plate fixed inside the air intake shell, a copper pipe installed at the top of the air intake shell and in contact with the drive motor, a flow guide plate fixed outside the copper pipe, and a cover fixed outside the flow guide plate.

[0023] The above technical solution uses a flow equalization plate to initially distribute the air entering the intake housing, making the airflow more evenly flow into the gap between the copper pipe and the housing. The copper pipe and the guide vane guide the heat generated by the drive motor into the air, thus completing the heat dissipation of the drive motor.

[0024] Furthermore, the guide vane has a spiral structure, and the contact surface between the copper tube and the drive motor is coated with thermally conductive silicone grease.

[0025] Through the above technical solution, the spiral guide vane guides the airflow along the spiral path, prolongs the contact time with the copper tube, enhances heat exchange, and applies thermal grease to the contact surface between the copper tube and the drive motor to reduce thermal resistance and improve heat transfer efficiency.

[0026] The above-described solution of this utility model has at least the following beneficial effects:

[0027] This invention utilizes a push-pull electromagnet to pull a moving ring downwards, compressing a return spring and causing the fixing bead to disengage from the groove of the cup cap, thus releasing the cup cap from its lock and allowing it to be removed for replacement. This achieves the easy replacement function of the device, facilitating quick cup cap replacement, significantly reducing equipment downtime, ensuring continuous operation of automated spraying lines, improving production efficiency, and simplifying the replacement process by reducing reliance on specialized tools, allowing ordinary operators to complete the task.

[0028] This invention uses a flow equalization plate to initially distribute the air entering the intake housing, making the airflow more evenly distributed into the gap between the copper tube and the housing. Since the copper tube and the guide vane direct the heat generated by the drive motor into the air, the motor cooling function of this device is realized. By evenly guiding the air entering the device and making it cool the drive motor, insulation aging and magnet demagnetization caused by overheating are avoided, thus extending the motor life. Attached Figure Description

[0029] Figure 1 This is one of the structural schematic diagrams of this utility model;

[0030] Figure 2 This is the second schematic diagram of the structure of this utility model;

[0031] Figure 3 A three-dimensional cross-sectional structural diagram of the mounting base provided by this utility model;

[0032] Figure 4 Provided by this utility model Figure 2 Enlarged cross-sectional view of point A in the middle section;

[0033] Figure 5 A three-dimensional structural diagram of the air guiding structure provided by this utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Outer shell; 2. Air spray cap; 3. Cup cap; 4. Paint outlet cap; 5. Spray nozzle; 6. Connecting bracket; 7. Mounting and unmounting structure; 701. Sleeve; 702. Push-pull electromagnet; 703. Moving base; 704. Bearing; 705. Fixing bead; 706. Sealing ring; 707. Return spring; 708. Moving ring; 709. Positioning groove; 8. Mounting plate; 9. Air guiding structure; 901. Cover; 902. Guide vane; 903. Copper pipe; 904. Flow equalization plate; 905. Air inlet shell; 10. Paint inlet pipe; 11. Rotary joint; 12. Air inlet pipe; 13. Drive motor; 14. Motor shaft; 15. Connecting pipe; 16. Mounting base; 17. Insulating support base. Detailed Implementation

[0036] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0037] like Figures 1 to 5 As shown, an embodiment of this utility model provides a high-speed electrostatic rotary cup for a robotic arm, including a housing 1, and further comprising:

[0038] Air spray cover 2 is threaded to the top of the outer shell 1, and only spray holes 5 are provided on the top and inner wall of the air spray cover 2.

[0039] The drive motor 13 is installed inside the housing 1, and a motor shaft 14 is installed inside the drive motor 13. A connecting pipe 15 is fixed inside the motor shaft 14, and an insulating support 17 is installed at the top of the drive motor 13.

[0040] Mounting base 16 is installed on the top of motor shaft 14, and a cup cap 3 is fitted on the top of mounting base 16, and a paint outlet cover 4 is installed inside the cup cap 3.

[0041] The loading and unloading structure 7 is located on the outside of the mounting base 16. The loading and unloading structure 7 includes a sleeve 701 fixed on the outside of the mounting base 16, a movable ring 708 slidably connected to the outside of the sleeve 701, a return spring 707 installed between the sleeve 701 and the movable ring 708, a fixing bead 705 slidably connected inside the sleeve 701, a positioning groove 709 opened at the top of the inside of the movable ring 708, and a movable component located on the outside of the movable ring 708.

[0042] The air guide structure 9 is located on the outside of the drive motor 13 and is used to guide airflow to cool the drive motor 13.

[0043] A paint inlet pipe 10 is installed inside the top of the outer casing 1. A rotary joint 11 is installed between the paint inlet pipe 10 and the connecting pipe 15. An air inlet pipe 12 is installed on one side of the top of the outer casing 1. A connecting bracket 6 is installed on the outer side of the bottom of the outer casing 1 by bolts, and a mounting plate 8 is fixed at the bottom of the connecting bracket 6.

[0044] In this embodiment of the invention, during use, the mounting plate 8 is installed on the moving end of the robot arm by bolts passing through it. Then, the air inlet pipe 12 and the paint inlet pipe 10 are connected to the high-pressure pipeline and the paint injection equipment, respectively. During spraying, the drive motor 13 starts working, driving the motor shaft 14 to rotate at high speed, providing centrifugal force to the cup cap 3. At the same time, the paint inlet pipe 10 delivers the paint through the rotary joint 11 to the inside of the connecting pipe 15. The paint enters the paint outlet cap 4 through the connecting pipe 15. Under the action of centrifugal force, the paint is atomized into fine particles and thrown out from the edge of the cup cap 3. Compressed air is input into the device through the air inlet pipe 12. Then, the compressed air is input into the inside of the air spray cap 2 through the air guide structure 9, and heats up and cools the drive motor 13. Compressed air is sprayed out through the spray holes 5 on the top and inner side wall of the air spray cap 2, further refining the paint particles and controlling the spray direction and range of the paint mist. A discharge ring is installed inside the insulating support base 17. The discharge ring builds a stable electrostatic field and releases charges, guiding the charged paint particles to be accurately adsorbed onto the surface of the workpiece.

[0045] like Figures 1 to 5 As shown, the moving assembly includes a bearing 704 fixed to the outside of the moving ring 708, a moving seat 703 installed on the outside of the bearing 704, and a push-pull electromagnet 702 installed inside the insulating support 17 and connected to the moving seat 703 at its moving end. The insert 701 and the cup cap 3 form an insert-pull structure. A sealing ring 706 that contacts the cup cap 3 is fixed on the inner side wall of the insert 701. The fixing beads 705 are arranged in a ring at equal intervals inside the insert 701. A groove matching the fixing beads 705 is opened on the outer side wall of the cup cap 3. The positioning groove 709 has a funnel-shaped inclined structure in frontal cross-section.

[0046] In this embodiment of the invention, when the cup cap 3 needs to be replaced, the push-pull electromagnet 702 is energized, causing its moving end to drive the moving seat 703 downward. Simultaneously, the moving seat 703, through the bearing 704, pushes the moving ring 708 downward along the outer side of the insert 701, compressing the return spring 707. At this time, the inclined structure of the positioning groove 709 no longer abuts against the fixing bead 705, causing the fixing bead 705 to be squeezed out of the groove on the outer wall of the cup cap 3 and slide into the positioning groove 709, thus releasing the pressure on the cup cap 3. Once locked, the operator can easily remove the cup cap 3 for replacement. After replacement, the push-pull electromagnet 702 is de-energized, the return spring 707 pushes the moving ring 708 upward, and the inclined surface of the positioning groove 709 presses the fixing bead 705 again, causing it to enter the groove on the outer wall of the cup cap 3, thus firmly locking the cup cap 3 onto the mounting base 16. The presence of the sealing ring 706 prevents paint leakage and ensures the sealing of the device. This enables the rapid replacement of the cup cap 3, which to some extent shortens equipment downtime and improves production efficiency.

[0047] like Figures 2 to 5As shown, the air guiding structure 9 includes an air intake shell 905 fixed inside the bottom of the outer shell 1 and connected to the air intake pipe 12, a flow equalization plate 904 fixed inside the air intake shell 905, a copper pipe 903 installed at the top of the air intake shell 905 and in contact with the drive motor 13, a flow guide 902 fixed outside the copper pipe 903, and a cover 901 fixed outside the flow guide 902. The flow guide 902 has a spiral structure, and the contact surface between the copper pipe 903 and the drive motor 13 is coated with thermal grease.

[0048] In this embodiment of the invention, compressed air is input through the intake pipe 12 and enters the intake housing 905. Then, the flow equalization plate 904 performs an initial distribution of the air entering the intake housing 905, so that the airflow flows more evenly into the gap between the copper pipe 903 and the cover 901. Since the copper pipe 903 is in close contact with the drive motor 13 and the contact surface is coated with thermal grease, the heat generated by the drive motor 13 can be efficiently transferred to the copper pipe 903. The spiral guide vane 902 guides the air to flow along the spiral path, prolonging the contact time between the air and the copper pipe 903, enhancing the heat exchange efficiency, completing the heat dissipation of the drive motor 13, reducing the operating temperature of the drive motor 13 to a certain extent, extending its service life, and ensuring the stability and reliability of the device under high-speed operation.

[0049] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A high-speed electrostatic rotary cup for a robotic arm, comprising an outer shell (1), characterized in that, Also includes: An air spray cap (2) is threaded to the top of the outer shell (1), and only spray holes (5) are provided on the top and inner sidewall of the air spray cap (2). A drive motor (13) is installed inside the outer casing (1), and a motor shaft (14) is installed inside the drive motor (13). A connecting pipe (15) is fixed inside the motor shaft (14), and an insulating support base (17) is installed at the top of the drive motor (13). Mounting base (16) is installed on the top of motor shaft (14), and a cup cap (3) is fitted on the top of the mounting base (16), and a paint outlet cap (4) is installed inside the cup cap (3). The loading and unloading structure (7) is provided on the outside of the mounting base (16). The loading and unloading structure (7) includes a sleeve (701) fixed on the outside of the mounting base (16), a moving ring (708) slidably connected to the outside of the sleeve (701), a return spring (707) installed between the sleeve (701) and the moving ring (708), a fixing bead (705) slidably connected to the inside of the sleeve (701), a positioning groove (709) opened at the top of the inside of the moving ring (708), and a moving component provided on the outside of the moving ring (708). An air-guiding structure (9) is provided on the outside of the drive motor (13) to guide airflow to cool the drive motor (13).

2. The high-speed electrostatic rotary cup for a robotic arm according to claim 1, characterized in that, A paint inlet pipe (10) is installed inside the top of the outer shell (1). A rotary joint (11) is installed between the paint inlet pipe (10) and the connecting pipe (15). An air inlet pipe (12) is installed on one side of the top of the outer shell (1). A connecting frame (6) is installed on the outer side of the bottom of the outer shell (1) by bolts, and a mounting plate (8) is fixed at the bottom of the connecting frame (6).

3. The high-speed electrostatic rotary cup for a robotic arm according to claim 1, characterized in that, The moving assembly includes a bearing (704) fixed to the outside of the moving ring (708), a moving seat (703) mounted on the outside of the bearing (704), and a push-pull electromagnet (702) mounted inside the insulating support (17) and connected to the moving seat (703) at its moving end.

4. The high-speed electrostatic rotary cup for a robotic arm according to claim 3, characterized in that, The insert (701) and the cup cap (3) form an insertion and removal structure, and a sealing ring (706) that contacts the cup cap (3) is fixed on the inner side wall of the insert (701).

5. A high-speed electrostatic rotary cup for a robotic arm according to claim 3, characterized in that, The fixing beads (705) are arranged in a ring at equal intervals inside the sleeve (701). The outer wall of the cup cap (3) is provided with a groove that matches the fixing beads (705). The positioning groove (709) has a funnel-shaped inclined structure in frontal cross-section.

6. The high-speed electrostatic rotary cup for a robotic arm according to claim 1, characterized in that, The air guiding structure (9) includes an air intake shell (905) fixed inside the bottom of the outer shell (1) and connected to the air intake pipe (12), a flow equalization plate (904) fixed inside the air intake shell (905), a copper pipe (903) installed at the top of the air intake shell (905) and in contact with the drive motor (13), a flow guide plate (902) fixed outside the copper pipe (903), and a cover (901) fixed outside the flow guide plate (902).

7. A high-speed electrostatic rotary cup for a robotic arm according to claim 6, characterized in that, The guide plate (902) has a spiral structure, and the contact surface between the copper tube (903) and the drive motor (13) is coated with thermal grease.

Images