Motor waterproof structure of small electric brake device

Abstract

The invention relates to the technical field of airplane wheel undercarriages of small fixed-wing unmanned aerial vehicles, in particular to a small electric brake device motor waterproof structure which comprises a waterproof cover, a sealing ring, a cylindrical head screw, a gasket and silicone rubber, the waterproof cover is installed at the tail of a motor, and the front end of the motor is fixed to an electric actuator shell through a screw; the sealing ring is mounted in the waterproof cover; the cylindrical head screw is used for fixedly installing the waterproof cover on the motor, the gasket is used in cooperation with the cylindrical head screw, and the matching position of the waterproof cover and the electric actuator shell is filled with the silicone rubber, so that in the using process of the electric brake device, water, dust and other foreign matter cannot enter the motor to damage the motor, and the service life of the motor is prolonged. And meanwhile, foreign matters such as water and dust can be prevented from entering the electric actuator through the motor, and the electric actuator has the advantages of good sealing performance, high reliability, low maintenance cost, short maintenance time, reusability and the like.

Description

Technical Field

[0001] This invention relates to the field of landing gear technology for small fixed-wing unmanned aerial vehicles (UAVs), and particularly to a waterproof structure for a small electric brake motor. Background Technology

[0002] With the development of science and technology, in order to improve the braking performance of aircraft and reduce the size of the wheel braking mechanism, aircraft braking systems have gradually evolved from the initial pneumatic braking systems to hydraulic braking systems. However, hydraulic braking systems have disadvantages such as low braking efficiency, large weight, oil leakage, easy fire, and slow response. Therefore, wheel braking systems are gradually evolving from hydraulic braking systems to all-electric braking systems.

[0003] Compared to hydraulic braking systems, all-electric braking systems are characterized by using electricity instead of the hydraulic power source and electromechanical actuators instead of the hydraulic actuators. Additionally, all-electric braking systems incorporate pressure sensors. All-electric braking systems offer significant advantages, not only reducing the risk of brake failure but also improving the safety and weight of aircraft braking systems.

[0004] Because fully electric braking systems replace traditional pneumatic and hydraulic power sources with electric power, and the braking mechanism is driven by a motor, the protection of internal electronic components in fully electric braking systems is subject to higher requirements. When designing electric braking devices, internal sealing must be fully considered to prevent water, dust, and other foreign objects from entering the electric actuator and damaging its internal electronic components during use. Therefore, designing a sealing structure with good sealing performance and high reliability is a crucial aspect of electric actuator design. Summary of the Invention

[0005] To address the problems mentioned in the background section, this invention provides a waterproof structure for a small electric brake device motor.

[0006] This invention discloses the following technical solution: a waterproof structure for a small electric brake device motor, comprising a waterproof cover, a sealing ring, a cylindrical head screw, a washer, and silicone rubber. The waterproof cover is installed at the tail of the motor, and the front end of the motor is fixed to the electric actuator housing by screws. The sealing ring is installed inside the waterproof cover. The cylindrical head screw is used to fix the waterproof cover to the motor. The washer is used in conjunction with the cylindrical head screw. The silicone rubber is filled into the mating area between the waterproof cover and the electric actuator housing.

[0007] Furthermore, the waterproof cover is provided with a sealing ring groove, a motor shaft groove, and cylindrical head screw holes. The cylindrical head screw holes are evenly distributed on the waterproof cover. The sealing ring is assembled into the sealing ring groove of the waterproof cover. The cylindrical head screw holes are used for installation. The diameter of the motor shaft groove is larger than the diameter of the motor shaft.

[0008] Furthermore, the number of cylindrical head screws is three.

[0009] Furthermore, the sealing ring is interference-fitted with the sealing ring groove.

[0010] Furthermore, a safety wire is provided at the cylindrical head screw to prevent loosening.

[0011] Beneficial effects: Compared with the prior art, the waterproof structure of the motor of the small electric brake device of the present invention, by setting a waterproof cover, sealing ring and silicone rubber, prevents water, dust and other foreign objects from entering the motor and damaging the motor during use. At the same time, it can also prevent water, dust and other foreign objects from entering the electric actuator through the motor. It has the advantages of good sealing performance, high reliability, low maintenance cost, short maintenance time and reusability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the fuse installation according to the present invention; Figure 3 This is a schematic diagram of the waterproof cover of the present invention; In the diagram: 1. Waterproof cover; 2. Sealing ring; 3. Motor; 4. Cylindrical head screw; 5. Washer; 6. Silicone rubber; 7. Electric actuator housing; 8. Fuse; 11. Sealing ring groove; 12. Motor shaft groove; 13. Cylindrical head screw hole. Detailed Implementation

[0013] like Figures 1 to 3 As shown, a waterproof structure for a small electric brake motor includes a waterproof cover 1, a sealing ring 2, a cylindrical head screw 4, a washer 5, and silicone rubber 6. The waterproof cover 1 is installed at the tail of a motor 3, and the front end of the motor 3 is fixed to the actuator housing 7 by screws. The sealing ring 2 is installed inside the waterproof cover 1. The cylindrical head screw 4 is used to fix the waterproof cover 1 to the motor 3 and is prevented from loosening by a fuse 8. The washer 5 works in conjunction with the cylindrical head screw 4 to ensure that the waterproof cover 1 is subjected to uniform force and to reduce surface damage. The silicone rubber 6 fills the mating area between the waterproof cover 1 and the actuator housing 7, serving to bond and seal.

[0014] The waterproof cover 1 is provided with a sealing ring groove 11, a motor shaft groove 12, and cylindrical head screw holes 13, which are evenly distributed on the waterproof cover 1. The sealing ring 2 is fitted into the sealing ring groove 11 of the waterproof cover 1 with an interference fit to ensure sealing performance. The waterproof cover 1 is fixed to the tail of the motor 3 by cylindrical head screws 4 and washers 5. The cylindrical head screws 4 pass through the cylindrical head screw holes 13. The sealing ring 2 provides a sealing function, preventing water, dust, and other foreign objects from entering the motor or actuator through the tail of the motor 3. The diameter of the motor shaft groove 12 is larger than the diameter of the motor shaft, ensuring sufficient clearance to avoid interference or wear between the motor shaft and the waterproof cover 1 during rotation.

[0015] In use, after inserting the sealing ring 2 into the sealing ring groove 11 of the waterproof cover 1, straighten the sealing ring 1 with a copper pin; after inserting the washer 5 into the cylindrical head screw 4, screw it into the tail of the motor 3 through the three cylindrical head screw holes 13 on the waterproof cover 1 to fix the waterproof cover 1 to the tail of the motor 3. After tightening the cylindrical head screw 4, install the fuse 8; after assembly, fill the mating area between the waterproof cover 1 and the electric actuator housing 7 with silicone rubber 6. The silicone rubber 6 and the sealing ring 2 form two barriers to ensure that water, dust and other foreign objects will not enter the motor and damage it during use. At the same time, it can also prevent water, dust and other foreign objects from entering the electric actuator through the motor, thereby enhancing sealing and reliability. Disassembly is simple and convenient, maintenance costs are low, maintenance time is short, and it is reusable.

[0016] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A waterproof structure for a small electric brake device motor, characterized in that: The device includes a waterproof cover (1), a sealing ring (2), a cylindrical head screw (4), a washer (5), and silicone rubber (6). The waterproof cover (1) is installed at the tail of the motor (3), and the front end of the motor (3) is fixed to the electric actuator housing (7) by screws. The sealing ring (2) is installed inside the waterproof cover (1). The cylindrical head screw (4) is used to fix the waterproof cover (1) to the motor (3). The washer (5) is used in conjunction with the cylindrical head screw (4). The silicone rubber (6) is filled into the mating area between the waterproof cover (1) and the electric actuator housing (7).

2. The waterproof structure of the motor for the small electric brake device according to claim 1, characterized in that: The waterproof cover (1) is provided with a sealing ring groove (11), a motor shaft groove (12) and a cylindrical head screw hole (13). The cylindrical head screw holes (13) are evenly distributed on the waterproof cover (1). The sealing ring (2) is assembled into the sealing ring groove (11) of the waterproof cover (1). The cylindrical head screw hole (13) is used for installation of cylindrical head screws (4). The diameter of the motor shaft groove (12) is larger than the diameter of the motor shaft (3).

3. The waterproof structure of the motor for the small electric brake device according to claim 1, characterized in that: The number of cylindrical head screws (4) is three.

4. The waterproof structure of the motor for the small electric brake device according to claim 1, characterized in that: The sealing ring (2) is interference-fitted with the sealing ring groove (11).

5. The waterproof structure of the motor for the small electric brake device according to claim 1, characterized in that: A fuse (8) is provided at the cylindrical head screw (4) to prevent loosening.

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