High shielding efficiency drive device

Abstract

This invention provides a high-shielding-efficiency drive device, belonging to the technical field of radio telescope components. It includes a base, a shielding cover, a drive mechanism, and a shielding ring. The shielding cover is fixedly connected to the base; the drive mechanism is located inside the shielding cover and fixedly connected to the base, with its output shaft inserted into a connecting hole; the shielding ring is sleeved on the output shaft to achieve a sealed connection between the output shaft and the connecting hole. Due to the elasticity of the shielding ring, when the output shaft passes through the connecting hole, the output shaft applies pressure to the shielding ring, causing it to deform. Subsequently, the shielding ring uses its own elastic force to abut against the side of the output shaft, thereby maintaining a connection between the output shaft and the inner wall of the connecting hole, thus shielding the gap between the output shaft and the inner wall of the connecting hole and improving the shielding efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of radio telescope components, and more specifically, it relates to a high shielding efficiency drive device. Background Technology

[0002] As a crucial tool for exploring the mysteries of the universe, the drive unit of a radio telescope is a core component ensuring precise pointing and stable observations. In complex electromagnetic environments, radio telescopes are extremely sensitive to electromagnetic interference; even weak electromagnetic noise can severely affect the accuracy of observational data. Therefore, the drive unit typically employs grounding for electromagnetic shielding. By constructing a complete shielding structure, external electromagnetic interference is blocked from the device, providing a stable environment for the high-precision operation of the radio telescope.

[0003] Existing drive mechanisms suffer from the following drawbacks: Because the output shaft of the drive mechanism needs to rotate to adjust the telescope's angle and control its pointing, gaps inevitably exist between the output shaft and the shielding structure. These gaps compromise the integrity of the shielding structure, allowing external electromagnetic interference to penetrate into the device, interfering with the normal operation of the drive mechanism and consequently affecting the radio telescope's observation accuracy. This results in poor shielding effectiveness, failing to meet the stringent electromagnetic shielding requirements of radio telescopes in high-precision observation scenarios. Utility Model Content

[0004] The purpose of this invention is to provide a high-shielding-efficiency driving device, which aims to solve the problem of poor shielding effectiveness of the shielding structure in existing driving devices.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a high-shielding-efficiency driving device, comprising:

[0006] The base has connection holes;

[0007] The shielding cover is fixedly connected to the base;

[0008] A drive mechanism is disposed within the shielding cover and fixedly connected to the base; the output shaft of the drive mechanism is inserted into the connecting hole.

[0009] A shielding ring is fitted over the output shaft to achieve a sealed connection between the output shaft and the connecting hole.

[0010] In one possible implementation, the base forms an annular mounting groove on the inner wall of the connecting hole, and the shielding ring is embedded in the mounting groove.

[0011] In one possible implementation, the shielding ring includes a support ring and elastic contact members fixedly connected to the inner wall of the support ring. The elastic contact members are provided in multiple quantities and are evenly distributed along the inner wall of the support ring.

[0012] In one possible implementation, the drive mechanism includes:

[0013] A speed reducer is fixedly connected to the base, and the output end of the speed reducer is provided with an output shaft, which passes through the connecting hole; and

[0014] The drive motor is fixedly connected to the reducer and connected to the input end of the reducer.

[0015] In one possible implementation, the shielding cover is provided with a ventilation waveguide window.

[0016] In one possible implementation, a rain cover is fixedly connected to the shielding cover, and the rain cover is positioned outside the ventilation waveguide window.

[0017] In one possible implementation, the drive mechanism further includes a filter shielding mechanism fixedly connected to the outer surface of the shielding cover, the filter shielding mechanism being electrically connected to the drive motor.

[0018] In one possible implementation, the shielding ring is a finger spring.

[0019] In one possible implementation, a sealing ring is provided between the base and the shield.

[0020] In one possible implementation, a shielding pad is provided between the base and the shielding cover.

[0021] The beneficial effects of the high shielding efficiency drive device provided by this utility model are as follows: Compared with the prior art, the high shielding efficiency drive device of this utility model utilizes a shielding cover and a base cover to surround the drive mechanism, thereby shielding most of the space around the drive mechanism. Because the shielding ring has a certain degree of elasticity, when the output shaft passes through the connecting hole, the output shaft applies a certain pressure to the shielding ring, causing the shielding ring to deform. Subsequently, the shielding ring uses its own elastic force to abut against the side of the output shaft, thereby maintaining the connection between the output shaft and the inner wall of the connecting hole, thus shielding the gap between the output shaft and the inner wall of the connecting hole and improving the shielding efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the high shielding efficiency driving device provided in this embodiment of the utility model;

[0024] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A;

[0025] Figure 3 This is a schematic diagram of another shielding ring provided in an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Base; 11. Connecting hole; 12. Mounting slot; 2. Shielding cover; 3. Drive mechanism; 31. Reducer; 32. Drive motor; 33. Output shaft; 4. Shielding ring; 41. Support ring; 42. Elastic contact; 5. Sealing ring; 6. Shielding gasket; 7. Ventilation waveguide window; 8. Rain cover; 9. Filter shielding mechanism. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] Reference Figure 1 and Figure 3 The high shielding efficiency driving device provided by this utility model will now be described. The high shielding efficiency driving device includes a base 1, a shielding cover 2, a driving mechanism 3, and a shielding ring 4.

[0030] A connection hole 11 is provided on the base 1. A shielding cover 2 is fixedly connected to the base 1. A drive mechanism 3 is fixedly connected to the base 1; the drive mechanism 3 is located inside the shielding cover 2 and fixedly connected to the base 1. The output shaft 33 of the drive mechanism 3 is inserted into the connection hole 11. A shielding ring 4 is sleeved on the outside of the output shaft 33 to achieve electromagnetic shielding between the output shaft 33 and the connection hole 11.

[0031] The base 1, shield 2, output shaft 33 of drive mechanism 3, and shielding ring 4 are all conductors. Shield 2 is a shell with one open side. The edge of the opening of shield 2 is provided with an outward-facing connecting plate. Threaded holes are provided on both the base 1 and the connecting plate. When installing shield 2, first pass the output shaft 33 of drive mechanism 3 through the connecting hole 11 of base 1 to fix drive mechanism 3 to base 1. Then, cover the outside of drive mechanism 3 with shield 2, aligning the threaded holes on the connecting plate with the threaded holes on base 1. Finally, use bolts to fix shield 2 to base 1.

[0032] Since both the base 1 and the shielding cover 2 are conductors, after the shielding cover 2 is installed, it connects to the base 1 as a whole. The electromagnetic waves generated when the drive mechanism 3 operates are shielded by the base 1 and the shielding cover 2, preventing them from penetrating the shielding cover 2 and the base 1 to propagate outwards. Simultaneously, the shielding ring 4 is positioned between the inner wall of the connecting hole 11 and the output shaft 33, sealing the gap between them. This prevents the electromagnetic waves generated when the drive mechanism 3 operates from propagating outwards through the gap between the inner wall of the connecting hole 11 and the output shaft 33. This achieves complete electromagnetic shielding of the drive mechanism 3, improving the shielding effectiveness.

[0033] In a preferred embodiment, both the base 1 and the shield 2 are made of stainless steel. Stainless steel is a steel with iron as its base and alloying elements such as chromium, nickel, and molybdenum added. Its unique composition endows it with special material properties. Regarding conductivity, due to the addition of alloying elements, the conductivity of stainless steel is slightly lower than that of pure iron, but it still possesses good conductivity, meeting the basic requirements of many electrical devices for conductive materials. Corrosion resistance is the most prominent advantage of stainless steel. Chromium reacts with oxygen on the steel surface to form a dense and stable passivation film. This passivation film acts like a strong armor, preventing oxygen and moisture from further corroding the internal metal and effectively resisting corrosion from various chemical media. Whether in a humid environment or with highly corrosive chemicals such as acids and alkalis, stainless steel maintains stable chemical properties and is not easily rusted or corroded.

[0034] Due to its excellent electrical conductivity and superior corrosion resistance, stainless steel has a wide range of applications. In the field of architectural decoration, stainless steel, with its beautiful and durable properties, is used to make railings, handrails, curtain walls, etc., which not only enhance the texture of buildings but also keep them looking new even after long-term exposure to wind and sun. In kitchenware, from pots and pans to large commercial kitchen utensils, stainless steel, with its corrosion resistance and easy cleaning, has become a reliable guarantee for food safety. In the manufacture of medical equipment, where hygiene and corrosion resistance are extremely important, the stability of stainless steel makes it an ideal material for scalpels, surgical instruments, and medical device shells. In addition, in the fields of electronic equipment and aerospace, stainless steel also plays an important role in the manufacture of components due to its good electrical conductivity and comprehensive performance.

[0035] Stainless steel has excellent electrical and magnetic properties, which can effectively block the propagation of electromagnetic signals and achieve electromagnetic interference shielding. It has high mechanical strength and corrosion resistance, and is not easily deformed or damaged in complex environments, so it can play a stable shielding role for a long time. It is also easy to process and form, and can be made into shielding components of various shapes and structures according to different shielding requirements. At the same time, its smooth surface makes it easy to clean and maintain, and it also has a certain aesthetic appeal, making it suitable for electromagnetic shielding scenarios with high environmental requirements.

[0036] In a preferred embodiment, the base 1 and the shield 2 are made of carbon steel. Carbon steel is an iron-carbon alloy with a carbon content between 0.0218% and 2.11%. Its mechanical properties vary significantly with the carbon content. Low-carbon steel is easy to process and has good weldability, making it suitable for chains, rivets, etc.; medium-carbon steel, after quenching and tempering, has moderate comprehensive properties and can be used for gears and shaft parts; high-carbon steel has high hardness and strong wear resistance, and is mostly used for cutting tools, molds, and springs. Carbon steel has a simple smelting process and low cost, making it easy to mass-produce. However, the carbon content affects casting and welding performance, and its corrosion resistance is poor, requiring surface treatments such as painting and galvanizing to enhance protection.

[0037] Carbon steel has a wide range of applications. In the construction industry, low-carbon steel bars and structural steel are used in concrete structures and steel frame structures. In the machinery manufacturing industry, medium-carbon steel is heat-treated to manufacture key mechanical parts, while high-carbon steel is used for processing tools. Different grades of carbon steel are also commonly used in everyday consumer goods such as tableware and hardware, as well as in the transportation industry such as automobile body structural parts and railway track pads.

[0038] In electromagnetic shielding applications, carbon steel possesses excellent magnetic permeability, making it suitable for low-frequency environments such as power equipment rooms for magnetic field shielding. It is also inexpensive and easy to manufacture, making it suitable for large-scale shielding projects. However, its high-frequency shielding effectiveness is limited, requiring combination with materials such as copper layers in the radio frequency band. Due to its susceptibility to rust, surface anti-corrosion treatment is necessary to ensure the shielding layer's performance. Furthermore, it's crucial to ensure tight and reliable connections between components to prevent electromagnetic leakage. Additionally, its significant weight necessitates careful evaluation or a lightweight design in weight-sensitive applications. In practical applications, the choice between single-carbon steel shielding or a combination solution depends on the electromagnetic environment, usage scenario, and budget.

[0039] In a preferred embodiment, both the base 1 and the shield 2 are made of aluminum alloy. Aluminum alloy is an alloy formed by adding other elements to aluminum, possessing several significant characteristics. Its density is low, only about one-third that of steel, yet different strengths can be obtained by adjusting alloying elements (such as copper, magnesium, and silicon) and heat treatment processes, covering a wide range from low-strength pure aluminum to high-strength aerospace-grade aluminum alloys. Aluminum alloy has good corrosion resistance, and a dense oxide film easily forms on its surface to prevent further corrosion, making it particularly suitable for humid environments. Furthermore, it possesses good thermal and electrical conductivity, processability, and weldability, allowing it to be manufactured into complex shapes through various processes such as casting, extrusion, and forging. It is also non-magnetic and has a high recyclability rate, making it a typical lightweight and environmentally friendly material.

[0040] Aluminum alloys have a wide range of applications. In the aerospace industry, high-strength aluminum alloys are used to manufacture structural components such as aircraft fuselages, wings, and landing gear, reducing weight while maintaining strength. In the automotive industry, aluminum alloys are used in engine blocks, wheel hubs, and body frames to achieve weight reduction and reduce fuel consumption. In the construction industry, aluminum alloy doors, windows, and curtain walls have become the mainstream choice due to their corrosion resistance, aesthetics, and durability. In the electronics industry, aluminum alloy casings are used in laptops, mobile phones, etc., ensuring heat dissipation while enhancing the product's texture. In the packaging industry, aluminum foil and aluminum cans are widely used due to their corrosion resistance and ease of processing.

[0041] In the field of electromagnetic shielding, aluminum alloys have unique advantages and key points to consider. Their characteristics include: excellent electromagnetic shielding effectiveness; in high-frequency electromagnetic environments (such as radio frequency and microwave bands), the high conductivity of aluminum alloys can effectively block electromagnetic waves through the eddy current effect, making them suitable for high-frequency scenarios such as communication equipment and radar systems; lightweight; compared to steel shielding materials, they are easier to install and apply to mobile devices or weight-sensitive applications; and diverse surface treatments, such as conductive oxidation and electroplating with metals (such as copper and nickel), can improve shielding performance and corrosion resistance. Furthermore, composite structures (such as an aluminum alloy substrate combined with a conductive coating) can optimize the shielding effect. Points to note include: limited low-frequency shielding performance. Due to aluminum's low permeability, it is weakly effective at shielding low-frequency electromagnetic interference such as power frequency magnetic fields, requiring the combination with ferromagnetic materials (such as ferrites) to form a composite shield; high requirements for welding and joint treatment. Gaps or poor welding in the shield can lead to electromagnetic leakage, necessitating continuous welding, conductive gaskets, or electromagnetic sealants to ensure shielding integrity; environmental adaptability issues. Although aluminum alloys have good corrosion resistance, they may still corrode in harsh environments such as salt spray and acid spray, requiring enhanced surface protection treatment; cost factors. High-performance aluminum alloys (such as aerospace-grade) are expensive, requiring the selection of appropriate grades based on shielding requirements and budget to balance performance and cost. In practical applications, aluminum alloys are commonly used for electromagnetic shielding in high-frequency electronic equipment, communication base stations, and medical instruments. Through reasonable design and material combinations, their advantages can be fully utilized to meet the electromagnetic protection needs of different scenarios.

[0042] In one possible implementation, an annular mounting groove 12 is provided on the inner wall of the connection hole 11, and the shielding ring 4 is embedded inside the mounting groove 12.

[0043] The shielding ring 4 is slightly larger than the width of the mounting groove 12. When installing the shielding ring 4, it is secured in the mounting groove 12 by its own elastic snap-fit. Installing the shielding ring 4 in the mounting groove 12 by snap-fit ​​simplifies the overall structure and assembly process.

[0044] In one possible implementation, the shielding ring 4 includes a support ring 41 and elastic contact members 42 fixedly connected to the inner wall of the support ring 41. Multiple elastic contact members 42 are provided and are evenly distributed along the inner wall of the support ring 41.

[0045] Both the elastic contact 42 and the support ring 41 are conductors. When the output shaft 33 passes through the connection hole 11, the output shaft 33 applies a certain pressure to the elastic contact 42, causing the elastic contact 42 to deform to a certain extent. Under the action of its own elastic force, the elastic contact 42 abuts against the side of the output shaft 33, ensuring that the shielding ring 4 can make stable contact with the output shaft 33, thereby ensuring the shielding effectiveness of the shielding ring 4.

[0046] In a preferred embodiment, both the shielding ring 4 and the mounting groove 12 are provided. By using the shielding ring 4 to seal the gap between the shielded output shaft 33 and the inner wall of the connecting hole 11, the shielding effect of the shielding cover 2 and the base 1 can be effectively improved, and electromagnetic waves generated when the drive mechanism 3 is working can be prevented from leaking out.

[0047] In a preferred embodiment, both the shielding ring 4 and the mounting slot 12 are provided in pairs. The two shielding rings 4 further improve the shielding effect and prevent the shielding effect from decreasing due to the failure of one of the shielding rings 4.

[0048] In a preferred embodiment, three shielding rings 4 and three mounting slots 12 are provided. The three shielding rings 4 further improve the shielding effect and avoid the situation where the shielding effect decreases due to the failure of one of the shielding rings 4.

[0049] In one possible implementation, the drive mechanism 3 includes a reducer 31 and a drive motor 32.

[0050] The reducer 31 is fixedly connected to the base 1. The output end of the reducer 31 is provided with an output shaft 33, which passes through the connecting hole 11. The drive motor 32 is fixedly connected to the reducer 31 and is connected to the input end of the reducer 31.

[0051] The drive motor 32 is connected to the input end of the reducer 31 and outputs power through the output shaft 33 at the output end. The torque and speed output by the drive motor 32 are adjusted by the reducer 31 and output through the output shaft 33, thereby providing suitable speed and torque for driving the moving mechanism of the radio telescope.

[0052] In one possible implementation, the shield 2 is provided with a ventilation waveguide window 7.

[0053] Ventilation waveguide windows 7 are provided on the shielding cover 2 to improve its heat dissipation and ventilation capacity while ensuring its shielding effectiveness. This allows the heat generated by the drive mechanism 3 during operation to be dissipated in a timely manner, preventing the drive mechanism 3 from malfunctioning due to excessively high temperatures within the shielding cover 2.

[0054] In one possible implementation, a rain cover 8 is fixedly connected to the shield 2, and the rain cover 8 covers the outside of the ventilation waveguide window 7.

[0055] The rain cover 8 is an open rain cover. It ensures good ventilation for the ventilation waveguide window 7 while also shielding it from rain and snow, preventing rain and snow from entering the interior of the shielding cover 2 during rainy or snowy weather. In a preferred embodiment, a ventilation window is provided on the side of the rain cover 8. The ventilation window ensures good ventilation for the ventilation waveguide window 7, and also shields it from rain and snow during rainy or snowy weather.

[0056] In one possible implementation, the drive mechanism 3 further includes a filter shielding mechanism 9 fixedly connected to the outer surface of the shielding cover 2, and the filter shielding mechanism 9 is electrically connected to the drive motor 32. The filter shielding mechanism 9 contains a filter, which is electrically connected to the drive motor 32, supplying power to the drive motor 32 and filtering signal noise.

[0057] In one possible implementation, the shielding ring 4 is a finger spring.

[0058] A finger spring is a metallic component with elastic conductive properties, typically made of conductive elastic materials such as beryllium copper or phosphor bronze. Its surface is often plated with silver or gold to enhance conductivity and corrosion resistance. Its characteristics include high elasticity, maintaining stable performance after repeated compression and deformation, ensuring long-term reliable electrical contact; excellent conductivity, effectively conducting current and electromagnetic signals; and a compact structure, allowing for design in different shapes (such as finger-shaped or comb-shaped) to adapt to installation requirements in confined spaces.

[0059] Finger springs are widely used in electronic equipment, communication equipment, aerospace, and other fields. In computer servers and switches, they are used for electrical connections and electromagnetic shielding between motherboards and plug-in boards. In radar and satellite equipment, they serve as elastic contact elements for high-frequency signal transmission. In battery modules and electronic control systems of new energy vehicles, they provide conductive connections and vibration damping. Furthermore, they are commonly used in movable connection parts of precision instruments and medical equipment to ensure stable signal transmission.

[0060] In the field of electromagnetic shielding, finger springs are characterized by their ability to fill gaps in equipment housings with elastic contact, blocking electromagnetic wave leakage paths. They are particularly suitable for scenarios involving dynamic connections or frequent disassembly, such as shielding of chassis doors and covers. Their conductive plating can enhance shielding effectiveness and effectively suppress electromagnetic interference. It is important to note that during installation, the compression of the finger springs must be uniform to avoid shielding failure due to poor contact. Long-term plating wear may affect conductivity, requiring regular inspection and maintenance. Different materials of finger springs are suitable for different frequency ranges; for high-frequency applications, materials with low contact resistance (such as gold-plated beryllium copper) should be selected. Furthermore, their shielding effectiveness is closely related to the gap width and arrangement density; the layout must be optimized according to the electromagnetic environment frequency and field strength during design to avoid leakage due to excessive spacing.

[0061] In one possible implementation, a sealing ring 5 is provided between the base 1 and the shield 2.

[0062] Since the contact surfaces between the shield 2 and the base 1 cannot be perfectly flat at a microscopic level, there will be some tiny gaps between them. When the shield 2 is installed on the base 1, a certain pressure is applied to the sealing ring 5 between the shield 2 and the base 1. Under the pressure, the sealing ring 5 will deform, thereby sealing the tiny gaps between the shield 2 and the base 1.

[0063] In one possible implementation, a shielding pad 6 is provided between the base 1 and the shielding cover 2.

[0064] In a preferred embodiment, the shielding pad 6 is specifically a metal wire mesh. Since the contact surfaces between the shielding cover 2 and the base 1 cannot be perfectly flat at a microscopic level, some small gaps will exist between them. When the shielding cover 2 is installed on the base 1, a certain pressure is applied to the shielding pad 6 between the shielding cover 2 and the base 1. Under this pressure, the shielding pad 6 deforms, thereby sealing the tiny gaps between the shielding cover 2 and the base 1 and improving the shielding effectiveness of the shielding cover 2.

[0065] The beneficial effects of the high shielding efficiency drive device provided by this utility model are as follows: Compared with the prior art, the high shielding efficiency drive device of this utility model uses a shielding cover 2 and a base 1 to cover the drive mechanism 3, thereby shielding most of the space around the drive mechanism 3. Since the shielding ring 4 has a certain elasticity, when the output shaft 33 passes through the connecting hole 11, the output shaft 33 applies a certain pressure to the shielding ring 4, causing the shielding ring 4 to deform. Subsequently, the shielding ring 4 uses its own elastic force to abut against the side of the output shaft 33, thereby maintaining the connection between the output shaft 33 and the inner wall of the connecting hole 11, thus shielding the gap between the output shaft 33 and the inner wall of the connecting hole 11 and improving the shielding efficiency.

[0066] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high shielding effectiveness drive device, characterized by, include: The base (1) has a connecting hole (11); The shield (2) is fixedly connected to the base (1); A drive mechanism (3) is disposed inside the shield (2) and fixedly connected to the base (1). The output shaft (33) of the drive mechanism (3) is inserted into the connection hole (11). A shielding ring (4) is fitted over the output shaft (33) to achieve a sealed connection between the output shaft (33) and the connecting hole (11).

2. The high shielding effectiveness drive device of claim 1, wherein, The base (1) has an annular mounting groove (12) on the inner wall of the connecting hole (11), and the shielding ring (4) is embedded in the mounting groove (12).

3. The high shielding effectiveness drive device of claim 2, wherein, The shielding ring (4) includes a support ring (41) and an elastic contact (42) fixedly connected to the inner wall of the support ring (41). There are multiple elastic contact (42) and the multiple elastic contact (42) are evenly distributed along the inner wall of the support ring (41).

4. The high shielding effectiveness drive device of claim 1, wherein, The drive mechanism (3) includes: A speed reducer (31) is fixedly connected to the base (1). The output end of the speed reducer (31) is provided with an output shaft (33), which passes through the connecting hole (11). The drive motor (32) is fixedly connected to the reducer (31) and connected to the input end of the reducer (31).

5. The high shielding effectiveness drive device of claim 1, wherein, The shielding cover (2) is provided with a ventilation waveguide window (7).

6. The high shielding effectiveness drive device of claim 5, wherein, A rain cover (8) is fixedly connected to the shielding cover (2), and the rain cover (8) covers the outside of the ventilation waveguide window (7).

7. The high shielding effectiveness drive device of claim 4, wherein, The drive mechanism (3) also includes a filter shielding mechanism (9) fixedly connected to the outer side of the shielding cover (2), and the filter shielding mechanism (9) is electrically connected to the drive motor (32).

8. The high shielding effectiveness drive device of claim 2, wherein, The shielding ring (4) is a finger spring.

9. The high shielding effectiveness drive device of claim 1, wherein, A sealing ring (5) is provided between the base (1) and the shield (2).

10. The high shielding effectiveness drive device of claim 1, wherein, A shielding pad (6) is provided between the base (1) and the shielding cover (2).

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