Waterproof high-speed brushless ducted motor

Abstract

The application relates to a waterproof high-speed brushless duct motor, which comprises a machine base with a winding and a stator, a rotor, a waterproof sealing cover, a duct cylinder and a stator chamber, a plastic sealing ring for preventing water vapor from entering is arranged at the bearing of the rotor, a circuit board is arranged at the waterproof sealing cover in a corresponding mode, a wire-through hole for leading out wires is arranged in the middle of the waterproof sealing cover, the wire-through hole is treated by glue pouring, a pipe penetrating the wire-through hole is arranged in the wire-through hole and is in abutting pressure cooperation with the circuit board, and a movable ring in cooperation with the pipe penetrating the wire-through hole is rotatably connected in the waterproof sealing cover. The pipe penetrating the wire-through hole in cooperation with the wire and in abutting pressure cooperation with the circuit board is arranged in the wire-through hole, the movable ring in cooperation with the pipe penetrating the wire-through hole is rotatably connected in the waterproof sealing cover, the pipe penetrating the wire-through hole can be driven to rotate or move in the glue pouring process, the pipe penetrating the wire-through hole and the movable ring can stir the uncoagulated glue, the glue liquid is forced to sufficiently fill the gap of the leading-out wire and to discharge air bubbles, and the waterproof grade of the motor and the reliability of long-term operation are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of brushless ducted motor technology, specifically a waterproof high-speed brushless ducted motor. Background Technology

[0002] High-speed brushless ducted motors are widely used in applications requiring high power density and waterproofing, such as drones, underwater propulsion systems, and power tools. Existing ducted motors typically include a frame, stator, rotor, and waterproof sealing cap. The duct is located outside the frame, and the stator has a stator chamber in the center. However, the motor's leads need to exit through the wiring holes in the waterproof sealing cap, which is a weak point in the waterproofing design. In existing technologies, some solutions improve waterproofing by injecting sealant into the wiring holes. However, since the leads are usually multi-stranded thin wires, it is difficult to evenly fill the gaps between the wires with sealant. Furthermore, air bubbles or uneven sealant distribution are prone to occur during the injection process, resulting in an unsatisfactory sealing effect after curing. Over long-term use, moisture can still seep into the motor through the surface of the leads or through capillary action between the wires, causing circuit board corrosion, insulation degradation, and even short circuits.

[0003] Therefore, a waterproof, high-speed brushless ducted motor is proposed to address the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a waterproof, high-speed brushless ducted motor.

[0005] The objective of this invention is achieved through the following technical solution: a waterproof high-speed brushless ducted motor, comprising: a frame with windings and a stator, a rotor that mates with the stator at one end of the frame, and a waterproof sealing cover at the other end, a duct cylinder outside the frame, a stator chamber that rotates with the rotor in the middle of the stator, a plastic sealing ring to prevent moisture from entering at the bearing of the rotor, a circuit board correspondingly provided at the waterproof sealing cover, and a wire hole for lead wires to pass through in the middle of the waterproof sealing cover, the wire hole being treated with potting compound. The wiring hole is equipped with a tube that mates with the lead wire and presses against the circuit board. The waterproof sealing cover is rotatably connected with a movable ring that mates with the tube. This significantly improves the sealing quality at the wiring hole, avoids air bubbles and uneven distribution of adhesive, enhances the overall waterproof rating of the motor, and strengthens the reliability of long-term operation.

[0006] As a further description of the above technical solution: The base is equipped with a guide vane located inside the duct, and a fan that works with the guide vane is provided at the end of the base. This optimizes the airflow path inside the motor and the duct, improves heat dissipation efficiency, and helps to improve the overall aerodynamic performance of the motor.

[0007] As a further description of the above technical solution: The tube is divided into a first tube located on the outside and a second tube located on the inside. The first tube has a movable groove to enhance the flexibility of the tube structure, facilitate segmented glue filling operation, and improve the uniformity of glue filling and sealing effect.

[0008] As a further description of the above technical solution: The crisscrossing grooves enhance the mixing effect, further promote the filling of tiny gaps by the adhesive, and improve the density and sealing performance of the adhesive.

[0009] As a further description of the above technical solution: The first tube is fixedly connected to a support plate that mates with the movable ring at one end near the circuit board, and a fixed ring that rotatably connects to the movable ring is fixedly connected inside the waterproof sealing cover.

[0010] As a further description of the above technical solution: The movable ring is fixedly connected to a contact post that mates with the tray, enabling the movable ring to effectively participate in the mixing process of the adhesive and enhance the tightness of the overall sealing structure.

[0011] As a further description of the above technical solution: The outer surface of the other end of the first tube is fixedly connected to a circular plate that presses against the waterproof sealing cap, which improves the positioning stability of the tube during the glue pouring process, prevents the tube from loosening or shifting, and ensures the accuracy of the glue pouring operation.

[0012] As a further description of the above technical solution: The second through tube is fixedly connected with multiple elastic pressure plates that press against the outer surface of the first through tube, which enhances the connection stability between the first and second through tubes, prevents relative sliding, and improves the mechanical reliability of the overall structure.

[0013] As a further description of the above technical solution: The second tube end is also equipped with a control plate. The circular plate has an arc-shaped slot that engages with the control plate, so as to achieve a firm connection between the tubes, prevent loosening in use or vibration environment, and improve the long-term stability of the motor under complex working conditions.

[0014] Compared with the prior art, the advantages of the present invention are as follows: Compared to traditional rotor and stator chambers, this invention eliminates the pores (which are present in traditional rotor and stator chambers), preventing water and moisture from entering. Additionally, plastic sealing rings are added to the rotor bearings to prevent moisture from entering the interior. Furthermore, by installing a tube inside the wiring hole that mates with the lead wire and presses against the circuit board, and by rotating a movable ring connected to the tube inside the waterproof sealing cap, the tube can be driven to rotate or move during the glue-pouring process. This causes the tube and movable ring to agitate the ungelled glue, forcing the glue to fully fill the gaps between the lead wires and expel air bubbles. Simultaneously, the tube itself constrains and guides the lead wires, ensuring a continuous and dense glue layer. After curing, the wiring hole treated in this way forms a uniform and robust sealing structure, significantly improving the motor's waterproof rating and long-term operational reliability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a side view schematic diagram of the structure of the present invention; Figure 3 This is a bottom view of the structure of the present invention; Figure 4 This is a schematic diagram of the disassembled structure of the duct and the base of the present invention; Figure 5 This is a schematic diagram of the disassembled structure of the guide vane and the base of the present invention; Figure 6 This is a schematic diagram showing the disassembled structure of the rotor, bearing, and plastic sealing ring of the present invention; Figure 7 This is a cross-sectional structural diagram of the waterproof sealing cap of the present invention; Figure 8 This is a schematic diagram of the disassembled structure of the waterproof sealing cover and the base of the present invention; Figure 9 This is a schematic diagram of the stator and rotor assembly structure of the present invention; Figure 10 This is a schematic diagram of the fitting structure between the waterproof sealing cap and the through-tube of the present invention; Figure 11 This is a schematic diagram of the disassembled structure of the waterproof sealing cap and the through-tube of the present invention; Figure 12 This is a schematic diagram of the fitting structure of the conduit, lead wire, and movable ring of the present invention; Figure 13 This is a schematic diagram of the disassembled structure of the first and second through-tubes of the present invention; Figure 14 This is a top view of the structure of the first through-tube and movable ring of the present invention.

[0016] Labeling Explanation: 1. Stator; 2. Frame; 3. Rotor; 4. Waterproof Sealing Cover; 5. Duct; 6. Bearing; 7. Plastic Sealing Ring; 8. Circuit Board; 9. Lead Wire; 10. Wire Hole; 11. Moving Ring; 12. Guide Vane; 13. Fan; 14. First Through-tube; 15. Second Through-tube; 16. Moving Slot; 17. Support Plate; 18. Fixed Ring; 19. Contact Post; 20. Circular Plate; 21. Elastic Pressure Plate; 22. Control Board; 23. Arc-shaped Slot. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments: like Figures 1-14 The figure shows a schematic diagram of an embodiment of a waterproof high-speed brushless ducted motor provided by the present invention, including: a frame 2 with windings and a stator 1, a rotor 3 that cooperates with the stator 1 at one end of the frame 2, a waterproof sealing cover 4 at the other end, a duct 5 outside the frame 2, a stator chamber that rotates with the rotor 3 in the middle of the stator 1, a plastic sealing ring 7 that prevents water vapor from entering at the bearing 6 of the rotor 3, a circuit board 8 correspondingly provided at the waterproof sealing cover 4, and a wire hole 10 for the lead wire 9 to pass through in the middle of the waterproof sealing cover 4, the wire hole 10 being treated with potting glue; The wire hole 10 is provided with a tube that mates with the lead wire 9 and presses against the circuit board 8. The waterproof sealing cover 4 is rotatably connected with a movable ring 11 that mates with the tube. That is, when the glue is poured, by driving the tube to rotate or move, the movable ring 11 is driven to rotate inside the waterproof sealing cover 4, thereby stirring the uncured glue, causing the glue to fill the gaps between the lead wires 9 evenly and expel air bubbles.

[0018] The base 2 is provided with a guide vane 12 located inside the duct 5. The end of the base 2 is provided with a fan 13 that cooperates with the guide vane 12. The guide vane 12 located inside the duct 5 is provided outside the base 2, and the fan 13 that cooperates with the guide vane 12 is installed at the end of the base 2 to form an airflow guiding structure.

[0019] In this application, the tube is divided into a first tube 14 located on the outside and a second tube 15 located on the inside. The first tube 14 is provided with a movable groove 16, and the relative position and movement state of the two can be adjusted respectively during glue pouring.

[0020] Among them, the movable grooves 16 are crisscrossed, and when the tube rotates or moves, the crisscrossed movable grooves 16 generate more complex disturbances to the adhesive liquid.

[0021] Furthermore, a support plate 17 that mates with the movable ring 11 is fixedly connected to one end of the first through tube 14 near the circuit board 8, and a fixed ring 18 that is rotatably connected to the movable ring 11 is fixedly connected inside the waterproof sealing cover 4, providing a stable rotation support structure to ensure that the movable ring 11 rotates smoothly during the glue pouring process, thereby improving the reliability and consistency of the stirring action.

[0022] The movable ring 11 is fixedly connected to a contact post 19 that cooperates with the support plate 17. During the movement, the support plate 17 cooperates with the contact post 19 to drive the movable ring 11 to rotate.

[0023] In this application, a circular plate 20 is fixedly connected to the outer surface of the other end of the first through-tube 14, which presses against the waterproof sealing cap 4 to restrict the axial movement of the through-tube.

[0024] It is worth noting that: multiple elastic pressure plates 21 are fixedly connected to the second through tube 15, which abut against the outer surface of the first through tube 14. The elastic pressure plates 21 abut against the outer surface of the first through tube 14 to form an elastic clamping structure.

[0025] Among them, the end of the second through-tube 15 is also provided with a control plate 22, and the circular plate 20 is provided with an arc-shaped slot 23 that engages with the control plate 22. The control plate 22 and the arc-shaped slot 23 engage and cooperate to further lock the relative position between the through-tubes.

[0026] Working principle: Traditional stator chambers have through holes, but the stator chamber in this application does not have through holes, and the wire hole 10 of the waterproof sealing cover 4 is treated with glue.

[0027] Specific glue application procedure: Before applying the adhesive, first insert the first tube 14 and second tube 15 into the lead wire 9 respectively, and then apply the adhesive to the position of the wire hole 10. After the adhesive is applied (before it gels), move the first tube 14 along the lead wire 9 and press the end of the first tube 14 against the circuit board 8 (at this time, the second tube 15 does not press against the circuit board 8). Since the tray 17 is facing the second tube 15 at this time, and the first tube 14 is pressed against the circuit board 8 along the lead wire 9, the tray avoids contacting the movable ring 11. When the end of the first tube 14 contacts the circuit board 8 (the round plate 20 is pressed against the waterproof sealing cover 4), the first tube 14 rotates, that is, the first tube 14 is attached to the circuit board 8 and rotates. The tray 17 makes a circular motion, thereby stirring the glue. While the tray is stirring, it contacts the contact post 19, which drives the movable ring 11 to make a circular motion along the fixed ring 18 at a certain angle. The rotating movable ring 11 and the contact post 19 further stir the glue. After the first through-tube 14 is stirred, the position of the arc-shaped groove 23 is aligned with the second through-tube 15. At this time, the support plate 17 is close to the inner wall of the waterproof sealing cover 4, and the support plate 17 is pressed and engaged with the movable ring 11 to prevent the first through-tube 14 from falling off the waterproof sealing cover 4. When the first through-tube 14 rotates, the glue is further moved by the cooperation of the crisscrossing movable grooves 16, which facilitates the glue pouring quality and ensures the waterproof effect. Then, move the second through tube 15 along the lead wire 9 so that the elastic pressure plate 21 passes over the circular plate 20, and then rotate the second through tube 15 so that the elastic pressure plate 21 rotates to contact the first through tube 14. Finally, the second tube 15 continues to move, the elastic pressure plate 21 bends and moves along the outer surface of the first tube 14, the control plate 22 is inserted into the arc-shaped slot 23, so that a stable connection is established between the first tube 14 and the second tube 15, and at the same time the end of the second tube 15 presses against the circuit board 8.

Claims

1. A waterproof high-speed brushless ducted motor, comprising: A frame (2) with windings and a stator (1), one end of the frame (2) is provided with a rotor (3) that cooperates with the stator (1), and the other end is provided with a waterproof sealing cover (4). The frame (2) is characterized in that: a duct (5) is provided outside the frame (2), a stator chamber that rotates with the rotor (3) is provided in the middle of the stator (1), a plastic sealing ring (7) is provided at the bearing (6) of the rotor (3) to prevent water vapor from entering, a circuit board (8) is provided at the waterproof sealing cover (4), and a wire hole (10) is provided in the middle of the waterproof sealing cover (4) for the lead wire (9) to pass through, and the wire hole (10) is treated with glue. The wire hole (10) is provided with a tube that cooperates with the lead wire (9) and presses against the circuit board (8). The waterproof sealing cover (4) is rotatably connected with a movable ring (11) that cooperates with the tube.

2. The waterproof high-speed brushless ducted motor according to claim 1, characterized in that: The base (2) is provided with a guide vane (12) located inside the duct (5), and the end of the base (2) is provided with a fan (13) that cooperates with the guide vane (12).

3. The waterproof high-speed brushless ducted motor according to claim 1, characterized in that: The tube is divided into a first tube (14) located on the outside and a second tube (15) located on the inside. The first tube (14) has a movable groove (16).

4. A waterproof high-speed brushless ducted motor according to claim 3, characterized in that: The movable groove (16) has a crisscross shape.

5. A waterproof high-speed brushless ducted motor according to claim 3, characterized in that: The first tube (14) is fixedly connected to a support plate (17) that cooperates with the movable ring (11) at one end near the circuit board (8), and a fixed ring (18) that is rotatably connected to the movable ring (11) is fixedly connected inside the waterproof sealing cover (4).

6. A waterproof high-speed brushless ducted motor according to claim 5, characterized in that: The movable ring (11) is fixedly connected to a contact post (19) that cooperates with the tray (17).

7. A waterproof high-speed brushless ducted motor according to claim 3, characterized in that: The outer surface of the other end of the first through tube (14) is fixedly connected to a circular plate (20) that presses against the waterproof sealing cap (4).

8. A waterproof high-speed brushless ducted motor according to claim 3, characterized in that: The second through tube (15) is fixedly connected with a plurality of elastic pressure plates (21) that press against the outer surface of the first through tube (14).

9. A waterproof high-speed brushless ducted motor according to claim 7, characterized in that: The end of the second through tube (15) is also provided with a control plate (22), and the circular plate (20) is provided with an arc-shaped slot (23) that engages with the control plate (22).

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