A conductive lap joint module for electromagnetically shielded rotating parts of a UAV power motor

Abstract

The present invention discloses a conductive lap joint module for an electromagnetic shielding rotating part of a power motor of a drone, which includes a conductive carbon core and a fixed metal block. The material mass percentage of the conductive carbon core is: graphite 75-85%, copper powder 5-10%, silver powder>0.5%, and adhesive 10-15%. The conductive carbon core is located at the lower part of the motor rotating shaft, a part of the conductive carbon core is located inside the rotating shaft, and the other part extends out of the rotating shaft from below the rotating shaft. The conductive carbon core is connected to the rotating shaft of the motor and overlapped with the fixed metal block at the bottom. The rotating shaft, the conductive carbon core, and the fixed metal block together form an electrical conduction state module. The conductive lap joint module for electromagnetic shielding rotating parts disclosed in the present invention uses a carbon core and a metal with a special composition ratio for lap joint, which can achieve the characteristics of low wear and excellent conductivity under the condition of high-speed rotation, thereby satisfying the electromagnetic shielding function and being compact and easy to replace.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic shielding of power motors for unmanned aerial vehicles, and in particular to a conductive overlapping module of an electromagnetic shielding rotating component of a power motor for unmanned aerial vehicles. Background Art

[0002] The power system of an electrically driven UAV generates electromagnetic radiation, which may interfere with the UAV power system or other electronic equipment, or even cause electromagnetic pollution. Therefore, electromagnetic shielding should be done for the power system, of which the motor is a key component. At the same time, since the motor rotor is a high-speed rotating component, it brings difficulties to the electromagnetic shielding work.

[0003] The existing technology uses conductors and the rotor (rotating component) of the motor for overlapping, usually using metal-to-metal overlapping, which is prone to wear and has an extremely short life. It also has a series of problems such as large size, difficulty in replacement, and the risk of residual debris causing damage to other components. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art, solve the problems existing in the prior art, and provide a conductive overlapping module for the electromagnetic shielding rotating parts of the UAV power motor, which is overlapped with a conductive carbon core and metal with a special composition ratio. It can achieve low wear and maintain excellent conductive properties under high-speed rotation conditions, thereby satisfying the electromagnetic shielding function of the motor part of the UAV power system, and can be small in size and easy to replace.

[0005] The technical solution of the present invention is:

[0006] A conductive overlapping module for an electromagnetically shielded rotating component of a power motor for an unmanned aerial vehicle, characterized in that it includes a conductive carbon core and a fixed metal block, wherein the conductive carbon core is located at the lower part of a rotating shaft of the motor, a part of the conductive carbon core is located inside the rotating shaft, and the other part extends out of the rotating shaft from below the rotating shaft, the conductive carbon core is connected to the rotating shaft of the motor and overlapped with the fixed metal block at the bottom, and the rotating shaft, the conductive carbon core and the fixed metal block together form an electrically conductive state module.

[0007] As a further improvement of the present solution, the conductive overlapping module of the electromagnetic shielding rotating part of the UAV power motor also includes an expansion sleeve and a metal spring. The expansion sleeve is arranged on the outer periphery of the conductive carbon core, and the inner periphery of the lower part of the expansion sleeve is close to the outer periphery of the conductive carbon core. The expansion sleeve is provided with two symmetrical grooves, and the metal spring is arranged on the upper part of the conductive carbon core and can generate a popping force on the conductive carbon core.

[0008] As a further improvement of the present solution, the conductive overlapping module of the electromagnetic shielding rotating component of the UAV power motor is also provided with a conical screw on the upper part of the metal spring, with the large head of the conical screw on the top and the small head on the bottom, and the conical screw can limit the axial direction of the conductive carbon core and the metal spring.

[0009] As a further improvement of the present solution, the conical screw has a bolt head on top, a cone below the bolt head, and a cylindrical screw rod below the cone. The bolt head, cone and cylindrical screw rod are integrally formed.

[0010] As a further improvement of the present solution, the conductive carbon core is an elongated cylinder, a cylindrical ring is sleeved on the top of the cylinder, the cylinder and the cylindrical ring are integrally formed, the length from the upper end of the cylindrical ring to the upper end of the cylinder is shorter than the natural length of the metal spring, and the outer diameter of the cylinder matches the inner diameter of the metal spring.

[0011] Advantages of the present invention:

[0012] The conductive overlapping module of the electromagnetic shielding rotating part of the UAV power motor disclosed in the present invention adopts a conductive carbon core and metal with a special composition ratio for overlapping, which can achieve the characteristics of low wear and excellent conductive performance under high-speed rotation conditions, thereby satisfying the electromagnetic shielding function of the motor part of the UAV power system and being compact and easy to replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0014] Figure 1 It is a schematic diagram of the conductive overlapping module of the electromagnetic shielding rotating component of the UAV power motor described in the present invention.

[0015] Figure 2 yes Figure 1 Schematic cross-sectional view of .

[0016] Figure 3 It is a schematic diagram of an exploded view of a conductive overlapping module of an electromagnetic shielding rotating component of a power motor for a UAV according to the present invention.

[0017] Figure 4 It is a schematic diagram of an exploded view of a conductive overlapping module of an electromagnetic shielding rotating component of a power motor for a UAV according to the present invention.

[0018] Among them: 1. rotating shaft 2, conical screw 3, metal spring 4, conductive carbon core 5, expansion sleeve 6, fixed metal block. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0020] like Figure 1-4 As shown, the present invention discloses a conductive overlap module of an electromagnetic shielding rotating part of a UAV power motor, which includes a conductive carbon core 4 and a fixed metal block 6. The material mass percentage of the conductive carbon core is: graphite 75-85%, copper powder 5-10%, silver powder>0.5%, and adhesive 10-15%. The conductive carbon core 4 is located at the lower part of the motor rotating shaft 1, a part of the conductive carbon core 4 is located inside the rotating shaft 1, and the other part extends out of the rotating shaft 1 from the bottom of the rotating shaft 1. The conductive carbon core 4 is connected to the rotating shaft 1 of the motor and overlaps with the fixed metal block 6 at the bottom. The rotating shaft 1, the conductive carbon core 4, and the fixed metal block 6 together form an electrically conductive state module. The conductive overlap module of the electromagnetic shielding rotating part of the UAV power motor disclosed in the present invention uses a conductive carbon core and a metal with a special composition ratio for overlap, which can achieve the characteristics of low wear and excellent conductivity under high-speed rotation conditions, thereby satisfying the electromagnetic shielding function of the motor part of the UAV power system, and can be small in size and easy to replace.

[0021] As a further improvement of this solution, the electromagnetic shielding rotating component conductive lap joint module of the UAV power motor also includes an expansion sleeve 5 and a metal spring 3. The expansion sleeve 5 is sleeved on the outer periphery of the conductive carbon core 4. The inner periphery of the lower part of the expansion sleeve 5 is close to the outer periphery of the conductive carbon core 4. The expansion sleeve 5 is provided with two symmetrical grooves. The metal spring 3 is provided on the upper part of the conductive carbon core 4 and can generate a popping force on the conductive carbon core 4. In this way, a good lap joint effect can be ensured, the electromagnetic radiation generated by the UAV power motor in actual work can be shielded, and the disassembly and replacement are convenient.

[0022] As a further improvement of this solution, the conductive overlap module of the electromagnetic shielding rotating part of the UAV power motor is also provided with a conical screw 2 on the upper part of the metal spring 3, the large head of the conical screw 2 is on the upper part and the small head is on the lower part, and the conical screw 2 can axially limit the conductive carbon core 4 and the metal spring 3. The conical screw 2 plays an axial limiting role on the conductive carbon core 4 and the metal spring 3, and at the same time plays an expansion role on the expansion sleeve 5, so that the expansion sleeve 5 and the internal metal spring 3 and the conductive carbon core 4 can be firmly fixed on the rotating shaft 1 of the motor, and at the same time have excellent replaceability.

[0023] As a further improvement of the present invention, the conical screw 2 has a bolt head on top, a cone below the bolt head, and a cylindrical screw below the cone, and the bolt head, cone, and cylindrical screw are integrally formed. In this way, the conical screw 2 is easy to process, install, and replace, and plays an axial limiting role for the conductive carbon core 4 and the metal spring 3, while expanding the expansion sleeve 5, so that the expansion sleeve 5 and the internal metal spring 3 and the conductive carbon core 4 can be firmly fixed on the rotating shaft 1 of the motor.

[0024] As a further improvement of this solution, the conductive carbon core 4 is a long cylinder, a cylindrical ring is sleeved on the cylinder, the cylinder and the cylindrical ring are integrally formed, the upper end of the cylindrical ring to the upper end of the cylinder is shorter than the natural length of the metal spring 3, and the outer diameter of the cylinder matches the inner diameter of the metal spring 3. The conductive carbon core 4 is more easily connected to the rotating shaft 1 and then overlapped with the fixed metal block 6 at the bottom to form a conductive state; the conductive carbon core 4 is placed inside the expansion sleeve 5, and the metal spring 3 on the upper part of the conductive carbon core 4 can generate a popping force on the conductive carbon core 4 to ensure a good overlapping effect.

[0025] The electromagnetic shielding rotating component conductive lap joint module of the UAV power motor disclosed in the present invention can be well applied to high-speed rotating motors that require electromagnetic shielding, and has the advantages of long lap conduction life, small size, excellent conduction effect, low maintenance and easy replacement.

[0026] The conductive carbon core 4 can be made of conductive carbon fiber. Conductive fiber is a highly conductive material with excellent comprehensive performance and many unparalleled advantages over other materials. In addition to high conductivity, it also has the characteristics of corrosion resistance, wear resistance, high temperature resistance, high strength, light weight, etc., and is widely used.

[0027] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention. The present invention also has a variety of implementation methods, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the scope of protection of the present invention.

Claims

1. A conductive lap joint module for electromagnetic shielding rotating parts of a UAV power motor, characterized in that: It includes a conductive carbon core and a fixed metal block. The conductive carbon core has the following material percentages by mass: graphite 75-85%, copper powder 5-10%, silver powder>0.5%, and adhesive 10-15%. The conductive carbon core is located at the lower part of the motor rotating shaft, a part of the conductive carbon core is located inside the rotating shaft, and the other part extends out of the rotating shaft from below the rotating shaft. The conductive carbon core is connected to the rotating shaft of the motor and overlapped with the fixed metal block at the bottom. The rotating shaft, the conductive carbon core, and the fixed metal block together form an electrical conduction state module; the conductive overlap module of the electromagnetic shielding rotating component of the UAV power motor also includes an expansion sleeve and a metal spring. The expansion sleeve is arranged on the outer periphery of the conductive carbon core, and the inner periphery of the lower part of the expansion sleeve is close to the outer periphery of the conductive carbon core. The expansion sleeve is provided with two symmetrical grooves. The metal spring is arranged on the upper part of the conductive carbon core and can generate a pop-up force on the conductive carbon core; the conductive overlap module of the electromagnetic shielding rotating component of the UAV power motor is also provided with a conical screw on the upper part of the metal spring, the large head of the conical screw is on the top, and the small head is on the bottom, and the conical screw can axially limit the conductive carbon core and the metal spring.

2. The conductive lap joint module for the electromagnetic shielding rotating component of the UAV power motor according to claim 1, characterized in that: The conical screw has a bolt head on top, a cone on the bottom of the bolt head, and a cylindrical screw rod on the bottom of the cone. The bolt head, the cone and the cylindrical screw rod are integrally formed.

3. The conductive lap joint module for electromagnetic shielding rotating parts of the UAV power motor according to claim 1, characterized in that: The conductive carbon core is a long cylinder, a cylindrical ring is sleeved on the top of the cylinder, the cylinder and the cylindrical ring are integrally formed, the distance from the upper end of the cylindrical ring to the upper end of the cylinder is shorter than the natural length of the metal spring, and the outer diameter of the cylinder matches the inner diameter of the metal spring.

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