Motor shielding module and transmission device

Abstract

The invention provides a motor shielding module and a transmission device.The motor shielding module comprises a shell, a motor, a transmission shaft, an end cover, a reduction gearbox and a shaft sleeve, a containing groove is formed in the shell, the motor and the reduction gearbox are arranged in the containing groove, the reduction gearbox is in transmission connection with the motor, and the shaft sleeve is arranged in the containing groove. An opening of the containing groove is covered with the end cover, a through hole is formed in the end cover, a shaft sleeve hole is formed in a rotating disc of the reduction gearbox, the shaft sleeve is inserted into the shaft sleeve hole, the transmission shaft is inserted into the shaft sleeve through the through hole, and the shaft sleeve is made of insulating materials. According to the motor shielding module, the motor is packaged in the shell, and electromagnetic signals generated by the motor are prevented from diffusing out of the shell, so that the electromagnetic signals are prevented from interfering work of an antenna and affecting communication performance of the antenna.

Description

Technical Field

[0001] The present invention belongs to the technical field of mobile communications, and in particular relates to a motor shielding module and a transmission device equipped with the motor shielding module. Background Art

[0002] In the field of mobile communications, antennas are key devices for signal transmission and reception, and their performance directly affects the overall efficiency and quality of the communication system. In order to adjust the communication performance more flexibly, motors are often used as power sources in antennas to drive the various components inside the antenna to move. For example, by driving the phase shifter's phase shifter to move, the antenna's phase can be adjusted to optimize the direction and strength of signal transmission; furthermore, the motor is also used to drive the antenna's mounting device to move relative to the pole to flexibly adjust the antenna's pitch and horizontal angles, ensuring that the antenna can be accurately aimed at the target communication area to adapt to different communication needs and environmental conditions.

[0003] Especially in multi-frequency antenna systems, in order to achieve effective transmission of signals in each frequency band, a mechanical downtilt method is usually used to adjust the beam downtilt angle, that is, a transmission device is set inside the antenna, and the transmission device is connected to the phase shifting components corresponding to each frequency band in the multi-frequency antenna. The transmission device is driven by a motor to drive the phase shifting component corresponding to any frequency band to move, thereby achieving phase shifting of the corresponding frequency band and then adjusting the beam downtilt angle.

[0004] However, although the motor has significant advantages in driving the movement of antenna components, the electromagnetic interference problem generated during its operation cannot be ignored. When the motor is working, due to the rapid change of current and mechanical movement, it will generate strong electromagnetic radiation, which will interfere with the normal operation of the antenna and cause the antenna communication performance to deteriorate. Especially in multi-frequency antenna systems, due to the existence of multiple frequency bands and complex electromagnetic environments, the electromagnetic interference problem of the motor is more prominent, seriously affecting the communication quality and stability of the antenna. Summary of the invention

[0005] The primary objective of the present invention is to solve at least one of the above problems and to provide a motor shielding module and a transmission device.

[0006] In order to meet the various objectives of the present invention, the present invention adopts the following technical solutions:

[0007] A motor shielding module is provided to meet one of the purposes of the present invention, including a shell, a motor, a transmission shaft, an end cover, a reduction gearbox and a sleeve, the shell is provided with a receiving groove, the motor and the reduction gearbox are installed in the receiving groove, the reduction gearbox is transmission-connected to the motor, the end cover covers the opening of the receiving groove, the end cover is provided with a through hole, the turntable of the reduction gearbox is provided with a sleeve hole, the sleeve is inserted into the sleeve hole, the transmission shaft is inserted into the sleeve via the through hole, and the sleeve is made of insulating material.

[0008] In one embodiment, the through hole is a stepped hole, the stepped hole includes a bearing hole, a bearing is sleeved on the transmission shaft, the bearing is located in the bearing hole, and the bearing is made of insulating material.

[0009] In one embodiment, the through hole is a stepped hole, which includes a disk hole and an axial hole. The disk hole is farther away from the motor than the axial hole. A fixed disk is sleeved on the transmission shaft and installed in the disk hole. The fixed disk is fixedly connected to the end cover.

[0010] In one embodiment, the aperture of the disk hole is larger than the aperture of the shaft hole, a first gap is formed between the fixed disk and the side wall of the disk hole, a second gap is formed between the fixed disk and the bottom of the disk hole, and a third gap is formed between the transmission shaft and the wall of the shaft hole. The first gap, the second gap and the third gap are connected in sequence, and an insulating ring is sleeved on the transmission shaft, and the insulating ring is arranged in the second gap.

[0011] Furthermore, the first gap, the second gap and the third gap are connected to form a Z-shaped structure.

[0012] In one embodiment, the end cap is made of insulating material.

[0013] In one embodiment, the transmission shaft is made of a metal material or a non-metal material having electromagnetic shielding performance.

[0014] In one embodiment, an insulating layer is provided on the groove wall of the accommodating groove.

[0015] A transmission device is provided to meet one of the purposes of the present invention, including a shell, in which a control component, an external transmission component and at least one motor shielding module as described in any one of the previous purposes are arranged, the control component is electrically connected to the motor shielding module, an output hole is opened on the shell, the transmission shaft of the motor shielding module is connected to the external transmission component through the output hole, and the external transmission component is used for connecting to the phase shifting component of the phase shifter.

[0016] In one embodiment, a shielding plate is further provided in the shell, and the shielding plate is arranged between the output hole and the motor shielding module. A shielding hole is opened on the shielding plate, and the end of the end cover of the motor shielding module away from the accommodating groove is arranged in the shielding hole.

[0017] Compared with the prior art, the present invention has many advantages, including but not limited to:

[0018] First, the motor generates electromagnetic fields and electromagnetic signals during operation. If there is no proper electrical isolation between the motor and the transmission shaft, these electromagnetic signals may be transmitted to the external environment through the transmission shaft, causing electromagnetic interference. This interference may affect the normal operation of other electronic equipment and may even leak sensitive information, posing a threat to the security and confidentiality of the system. The present invention effectively solves this problem by providing an insulating sleeve. It can electrically cut off the direct connection between the motor and the transmission shaft, thereby preventing the electromagnetic signals generated by the motor from leaking to the outside world through the transmission shaft.

[0019] Secondly, in addition to preventing electromagnetic signal leakage, the insulating sleeve can also enhance the stability and safety of the system. In complex electromagnetic environments and severe weather conditions, such as lightning, static electricity, etc., the insulating sleeve can protect the transmission shaft from electromagnetic shock and prevent current leakage or short circuit accidents. This helps to extend the service life of the system and improve the reliability and safety of the system.

[0020] Furthermore, the present invention integrates key components such as the motor and the reduction box into a housing and arranges these components rationally through the accommodating grooves, so that the entire motor shielding module has a compact structure and occupies a small space. This greatly improves the space utilization rate for devices such as antennas that have extremely strict space requirements, and is conducive to the overall design and optimized layout of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 It is a three-dimensional schematic diagram of the motor shielding module of the present invention.

[0023] Figure 2 Schematic diagram of an explosion of a motor shielding module according to a typical embodiment of the present invention.

[0024] Figure 3 It is a cross-sectional schematic diagram of a motor shielding module according to a typical embodiment of the present invention.

[0025] Figure 4 FIG. 1 is an exploded schematic diagram of a motor shielding module according to an embodiment of the present invention.

[0026] Figure 5 The figure is a cross-sectional schematic diagram of a motor shielding module according to an embodiment of the present invention.

[0027] Figure 6 for Figure 5 Magnified view of part A.

[0028] Figure 7 It is a three-dimensional schematic diagram of a transmission device according to a typical embodiment of the present invention.

[0029] Figure 8 It is a schematic structural diagram of a transmission device (housing not shown) according to a typical embodiment of the present invention. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and cannot be interpreted as limiting the present invention.

[0031] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0032] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as herein.

[0033] The present invention provides a motor shielding module, which can shield electromagnetic signals generated by a motor arranged therein, so as to prevent the electromagnetic signals generated by the motor from affecting the communication performance of an antenna.

[0034] In an exemplary embodiment of the present invention, Figures 1 to 3 or combined Figure 1 , Figure 4 and Figure 5 The motor shielding module 100 includes a housing 110, a motor 120, a transmission shaft 130, an end cover 140, a reduction box 180, and a sleeve 190. The housing 110 is provided with a receiving groove 111, the motor 120 and the reduction box 180 are installed in the receiving groove 111, and the end cover 140 covers the opening of the receiving groove 111 to seal the receiving groove 111 to form a closed space to prevent leakage of electromagnetic signals generated when the motor 120 is working.

[0035] An insulating layer is provided on the wall of the accommodating groove 111 to prevent the electromagnetic signal generated by the motor 120 from leaking to the outside through the housing 110 and preventing the electromagnetic signal from interfering with the antenna. In this embodiment, the housing 110 is made of metal material to improve the structural stability of the motor shielding module 100.

[0036] In this embodiment, the end cover 140 is made of an insulating material, such as a plastic material, so that no insulating layer is required on the surface of the end cover 140 to shield electromagnetic signals and prevent electromagnetic signals from being dissipated to the outside through the end cover 140 .

[0037] In this embodiment, the end cover 140 is made of plastic material as an example to describe the present invention, but this should not be construed as limiting the present invention.

[0038] Combination Figure 3 or Figure 5The output shaft 121 of the motor 120 is inserted into the reduction box 180 , which means that the motor 120 transmits torque through the reduction box 180 . The end cover 140 is provided with a through hole, which is a stepped hole 141. The transmission shaft 130 is inserted into the stepped hole 141 to extend into the accommodating groove 111 through the stepped hole 141, and one end of the transmission shaft 130 extending into the accommodating groove 111 (the end is called the connecting end 131) is inserted into the turntable 181 of the reduction box 180, so that the motor 120 drives the transmission shaft 130 to rotate through the reduction box 180, and the end of the transmission shaft 130 outside the accommodating groove 111 (the end is called the transmission end 132) is used to connect with the components of the antenna to drive the corresponding components of the antenna to move. For example, the transmission end 132 of the transmission shaft 130 is connected to the phase shifting component of the antenna, and the transmission shaft 130 is driven to rotate by the motor 120, and the phase shifting component is driven to move through the transmission shaft 130 to implement phase shifting.

[0039] The transmission shaft 130 is made of a metal material or a non-metal material that can shield electromagnetic signals, so that the transmission shaft 130 can shield electromagnetic signals to prevent the electromagnetic signals generated by the motor 120 from being dissipated along the transmission shaft 130 to the outside of the motor shielding module 100 and affecting the communication performance of the antenna. In this embodiment, it is recommended that the transmission shaft 130 be made of a metal material with electromagnetic shielding effect such as aluminum, copper, and silver, so that the transmission shaft 130 has an electromagnetic shielding effect without reducing the rigidity of the transmission shaft 130.

[0040] In one embodiment, the transmission shaft 130 may be made of insulating material to shield electromagnetic signals, so as to prevent the electromagnetic signals generated by the motor 120 from being dissipated to the antenna components along the transmission shaft 130. The insulating material is preferably a plastic material, especially a plastic material with strong rigidity, so that the transmission shaft 130 can well transmit the torque output by the motor 120 to drive the antenna components to move.

[0041] In another embodiment, the transmission shaft 130 is made of metal material, and an insulating layer is provided on the surface of the transmission shaft 130 to shield electromagnetic signals and prevent the electromagnetic signals generated by the motor 120 from radiating to the antenna along the transmission shaft 130 to avoid affecting the communication performance of the antenna.

[0042] In an exemplary embodiment of the present invention, a through hole (the through hole is referred to as a sleeve hole 182) is formed on the rotating disk 181 of the reduction box 180, and the sleeve 190 is inserted into the sleeve hole 182. The connecting end 131 of the transmission shaft 130 is inserted into the sleeve 190, so that the transmission shaft 130 is connected to the rotating disk 181 via the sleeve 190.

[0043] In this embodiment, the sleeve 190 is made of an insulating material, so that the transmission shaft 130 and the reduction box 180 are separated by the sleeve 190, so that the transmission shaft 130 and the reduction box 180 are insulated from each other, and the transmission shaft 130 and the motor 120 are also insulated, that is, there is no electrical connection between the transmission shaft 130 and the reduction box 180 and the motor 120, thereby further preventing the electromagnetic signal generated by the motor 120 from being dissipated outside the motor shielding module 100 through the transmission shaft 130, and preventing the electromagnetic signal generated by the motor 120 from interfering with the operation of the antenna. In this embodiment, it is recommended that the sleeve 190 is made of a plastic material, or the sleeve 190 is made of a metal material, but the sleeve 190 is covered with an insulating layer.

[0044] Combination Figure 3 The stepped hole 141 includes a disc hole 1411 and an axial hole 1412. The diameter of the disc hole 1411 is larger than that of the axial hole 1412. The disc hole 1411 and the axial hole 1412 are sequentially connected along the axial direction of the transmission shaft 130 from the transmission end 132 of the transmission shaft 130 to the connection end 131 of the transmission shaft 130, and the disc hole 1411 is provided at one end of the end cover 140. A sleeve hole is provided in the fixing disc 150. The fixing disc 150 is sleeved on the transmission shaft 130 through the sleeve hole, and the fixing disc 150 is installed in the disc hole 1411.

[0045] In one embodiment, in combination Figure 5 and Figure 6 A first gap 171 is formed between the side wall of the fixed disk 150 and the side wall of the disk hole 1411, a second gap 172 is formed between the bottom wall of the fixed disk 150 and the bottom wall of the disk hole 1411, and a third gap 173 is formed between the transmission shaft 130 and the shaft hole 1412. The first gap 171, the second gap 172 and the third gap 173 are connected in sequence. The first gap 171, the second gap 172 and the third gap 173 are connected in sequence to form a gap of a Z-shaped structure.

[0046] If the electromagnetic signal generated by the motor 120 wants to radiate out of the accommodating groove 111, then when the accommodating groove 111 is sealed by the end cover 140, the electromagnetic signal needs to pass through the gap of the Z-shaped structure formed by the third gap 173, the second gap 172 and the first gap 171. The gap of the Z-shaped structure will produce a tunnel effect on the electromagnetic signal, increase the loss of the electromagnetic signal in the transmission process, and will greatly block and weaken the electromagnetic signal generated by the motor 120, thereby avoiding leakage of the electromagnetic signal generated by the motor 120 and interfering with the antenna operation.

[0047] Specifically, firstly, the electromagnetic signal generated by the motor 120 will diverge along the third gap 173, but because the third gap 173 is directly opposite to the fixed disk 150, the fixed disk 150 will reflect the electromagnetic signal, so that the electromagnetic signal re-enters the closed space, thereby reducing the amount of electromagnetic signal output to the outside and weakening the strength of the electromagnetic signal; secondly, after part of the signal is refracted from the third gap 173 into the second gap 172, because the second gap 172 is directly opposite to the hole side wall of the disk hole 1411, the hole side wall of the disk hole 1411 will The electromagnetic signal will be reflected onto the transmission shaft 130, and part of the electromagnetic signal will re-enter the first gap 171 and the accommodating groove 111 to reduce the amount of electromagnetic signal output to the outside and weaken the strength of the electromagnetic signal; thereafter, the amount of electromagnetic signal refracted into the first gap 171 through the second gap 172 will be sharply reduced compared to the amount of electromagnetic signal generated by the motor 120, so that the amount of electromagnetic signal output by the motor 120 to the motor shielding module 100 is smaller, and the strength of the electromagnetic signal is also significantly reduced, so as to significantly reduce the electromagnetic interference to the antenna.

[0048] In this embodiment, the transmission shaft 130 is sleeved with an insulating ring 161, and the insulating ring 161 is made of insulating material. It is recommended that the insulating ring 161 is made of plastic material, but this should not be understood as a limitation of the present invention. The insulating ring 161 is sleeved on the transmission shaft 130, and the insulating ring 161 is also located in the disk hole 1411, and the insulating ring 161 is located between the fixed disk 150 and the bottom wall of the disk hole 1411, that is, the insulating ring 161 is located in the second gap 172.

[0049] Because the insulating ring 161 is located in the second gap 172, the insulating ring 161 can block the electromagnetic signal refracted into the second gap 172 through the third gap 173 from further diverging. Under the blocking of the insulating ring 161, the electromagnetic signal cannot cross the insulating ring 161 and enter the first gap 171, thereby preventing the electromagnetic signal from diverging out of the motor shielding module 100, and further ensuring that the electromagnetic signal generated by the motor 120 will not interfere with the operation of the antenna.

[0050] Moreover, in this embodiment, the fixed plate 150 will apply pressure to the insulating ring 161, so that the insulating ring 161 can stably block the second gap 172, avoiding the formation of a gap between the insulating ring 161 and the second gap 172, so that the insulating ring 161 can block the electromagnetic signal radiated into the second gap 172, avoiding the electromagnetic signal radiating to the outside of the motor shielding module 100, so as to avoid interfering with the operation of the antenna.

[0051] In this embodiment, combined with Figure 3 or Figure 5The fixing plate 150 is a flange, which is fixedly connected to the end cover 140. The flange cooperates with the stepped hole 141 on the end cover 140 to position the transmission shaft 130, so that the transmission shaft 130 can be stably inserted into the receiving groove 111 to transmit the torque output by the motor 120. In one embodiment, it is recommended that the fixing plate 150 and the end cover 140 are integrally formed.

[0052] In this embodiment, the end cap 140 is made of metal material to improve the structural stability of the motor shielding module 100. In a further embodiment, an insulating layer is provided on the surface of the end cap 140 made of metal material to prevent the electromagnetic signal generated by the motor 120 from being dissipated to the outside through the end cap 140, thereby preventing the electromagnetic signal from interfering with the antenna operation.

[0053] In one embodiment, in combination Figure 5 The stepped hole 141 further includes a bearing hole 1413, and the bearing hole 1413 is disposed adjacent to the shaft hole 1412, and the bearing hole 1413 is disposed closer to the motor 120 than the shaft hole 1412. Figure 5 and Figure 4 The motor shielding module 100 also includes a bearing 163, which is sleeved on the transmission shaft 130 and installed in the bearing hole 1413. The bearing 163 is used to position the radial freedom of the transmission shaft 130 and reduce the power loss when the transmission shaft 130 is idling.

[0054] In this embodiment, the bearing 163 is made of insulating material to prevent electromagnetic signals from being emitted to the transmission shaft 130 through the bearing 163, to prevent electromagnetic signals from being emitted to the outside through the transmission shaft 130, and to prevent electromagnetic signals from interfering with antenna operation. In this embodiment, it is recommended that the bearing 163 be made of plastic material.

[0055] In one embodiment, the motor shielding module 100 further includes a control circuit, and the control circuit is electrically connected to the motor 120 to control the operation of the motor 120. Figure 2 and Figure 3 The control circuit is integrated on the circuit board 112 , and the control circuit is electrically connected to an external device through a cable. The external device controls the motor 120 to work by sending a signal to the control circuit.

[0056] The present invention also provides a transmission device 200, which is arranged in a multi-frequency antenna. The transmission device 200 is transmission-connected to a phase shifting device in the multi-frequency antenna. The transmission device 200 is respectively connected to phase shifting components corresponding to each frequency band in the multi-frequency antenna through a transmission component 230. The transmission device 200 realizes phase shifting by driving the phase shifting component corresponding to any frequency band to move.

[0057] Specifically, combined Figure 7 and Figure 8 The transmission device 200 includes a shell 210, a control component 220, a transmission component 230 and the motor shielding module 100 described above. The control component 220 and the motor shielding module 100 are arranged in the shell 210. The control component 220 is electrically connected to the control circuit of the motor shielding module 100, so that the control component 220 can control the motor shielding module 100 to work through the control circuit.

[0058] The housing 210 is provided with an output hole 211, and the transmission shaft 130 of the motor shielding module 100 can extend to the outside of the housing 210 through the output hole 211. The transmission shaft 130 is connected to the transmission component 230, and the transmission component 230 is transmission-connected to the phase shifting component of the phase shifting device. When the motor 120 rotates, the motor 120 drives the phase shifting component to move through the transmission shaft 130, so that the phase shifting device performs phase shifting and changes the phase of the signal.

[0059] In this embodiment, the transmission shaft 130 does not contact the output hole 211 to prevent the transmission shaft 130 from being electrically connected to the shell 210 through the output hole 211, that is, to prevent the motor 120 from being electrically connected to the shell 210 through the transmission shaft 130, so that the electromagnetic signal generated by the motor 120 will not be dissipated to the outside through the shell 210, that is, it will not interfere with the operation of the antenna.

[0060] In one embodiment, in combination Figure 8 A shielding plate 240 is further provided in the shell 210. The shielding plate 240 is arranged between the output hole 211 and the motor shielding module 100. A shielding hole 241 is opened on the shielding plate 240. An end of the end cover 140 away from the motor 120 (this end is called the first end 142) is overlapped on the shielding hole 241.

[0061] The shielding plate 240 is made of insulating material. When the first end 142 of the end cover 140 is disposed in the shielding hole 241, the motor shielding module 100 can be suspended in the housing 210 to avoid electrical connection between the motor shielding module 100 and the housing 210, thereby preventing the electromagnetic signal generated by the motor 120 from being output to the outside through the housing 210 and interfering with the antenna operation. In addition, an insulating support seat is provided inside the housing 210, and the insulating support seat is made of insulating material. The motor shielding module 100 is supported by the insulating support seat so that the motor shielding module 100 can be stably disposed in the housing 210.

[0062] In one embodiment, an insulating layer is provided on the inner wall of the shell 210, so that when the motor shielding module 100 arranged in the shell 210 contacts the shell 210, the motor shielding module 100 will not be electrically connected to the shell 210, so that the electromagnetic signal generated by the motor 120 will not be dissipated to the outside through the shell 210, thereby avoiding the electromagnetic signal interfering with the antenna operation.

[0063] In summary, the motor shielding module of the present invention encapsulates the motor in a housing to prevent the electromagnetic signal generated by the motor from radiating out of the housing, thereby preventing the electromagnetic signal from interfering with the antenna and affecting the communication performance of the antenna.

[0064] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the above features are replaced with the technical features with similar functions invented in the present invention (but not limited to) to form a technical solution.

[0065] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

Claims

1. A motor shielding module, characterized in that: It includes a shell, a motor, a transmission shaft, an end cover, a reduction box and a sleeve. The shell is provided with a receiving groove, the motor and the reduction box are installed in the receiving groove, the reduction box is connected to the motor in a transmission manner, the end cover covers the opening of the receiving groove, the end cover is provided with a through hole, the turntable of the reduction box is provided with a sleeve hole, the sleeve is inserted into the sleeve hole, the transmission shaft is inserted into the sleeve through the through hole, and the sleeve is made of insulating material.

2. The motor shielding module according to claim 1, characterized in that: The through hole is a stepped hole, and the stepped hole includes a bearing hole. A bearing is sleeved on the transmission shaft, and the bearing is located in the bearing hole. The bearing is made of insulating material.

3. The motor shielding module according to claim 1, characterized in that: The through hole is a stepped hole, which includes a disk hole and an axial hole. The disk hole is farther away from the motor than the axial hole. A fixed disk is sleeved on the transmission shaft and installed in the disk hole. The fixed disk is fixedly connected to the end cover.

4. The motor shielding module according to claim 3, characterized in that: The aperture of the disk hole is larger than the aperture of the shaft hole, a first gap is formed between the fixed disk and the side wall of the disk hole, a second gap is formed between the fixed disk and the bottom of the disk hole, a third gap is formed between the transmission shaft and the wall of the shaft hole, the first gap, the second gap and the third gap are connected in sequence, an insulating ring is sleeved on the transmission shaft, and the insulating ring is arranged in the second gap.

5. The motor shielding module according to claim 4, characterized in that: The first gap, the second gap and the third gap are connected to form a Z-shaped structure.

6. The motor shielding module according to claim 1, characterized in that: The end cover is made of insulating material.

7. The motor shielding module according to claim 1, characterized in that: The transmission shaft is made of a metal material or a non-metal material with electromagnetic shielding performance.

8. The motor shielding module according to claim 1, characterized in that: An insulating layer is arranged on the groove wall of the accommodating groove.

9. A transmission device, characterized in that: The invention comprises a shell, wherein a control component, an external transmission component and at least one motor shielding module according to any one of claims 1 to 8 are arranged in the shell, wherein the control component is electrically connected to the motor shielding module, an output hole is opened on the shell, and a transmission shaft of the motor shielding module is transmission-connected to the external transmission component through the output hole, and the external transmission component is used for transmission connection to the phase shifting component of the phase shifter.

10. The transmission device according to claim 9, characterized in that A shielding plate is also provided in the shell, and the shielding plate is arranged between the output hole and the motor shielding module. A shielding hole is opened on the shielding plate, and an end of the end cover of the motor shielding module away from the accommodating groove is arranged in the shielding hole.

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