A special-shaped wheel hub reflection unit

Abstract

The present application relates to a special-shaped hub reflection unit, which relates to the technical field of mechanical agitators in electromagnetic wave reverberation chambers. The unit comprises a special-shaped impeller, a driving member for driving the special-shaped impeller to rotate, and a support for supporting the special-shaped impeller. The special-shaped impeller comprises a rotating shaft and a special-shaped wheel disposed on the peripheral wall of the rotating shaft, the rotating shaft being rotatably connected to the support. The special-shaped wheel comprises at least two blades disposed in different planes, all of which form a plurality of reflective surfaces. The blades are interspersed with a plurality of metal reflective sheets for reflecting electromagnetic waves. The metal reflective sheets are dispersed on the blades, which helps to increase the randomness of the distribution position and shape of the reflective surfaces, thereby improving the uniformity of the distribution of electromagnetic waves in the reverberation chamber. As a result, the number of special-shaped wheels can be reduced, thereby reducing the overall volume of the reflection unit and adapting to reverberation chambers of various sizes.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical stirrers in radio wave reverberation chambers, and in particular to a special-shaped hub reflection unit. Background Art

[0002] With the development of 5G, the Internet of Things, and intelligent electronic devices, the environment in which we live is flooded with electromagnetic signals. The normal operation of each device is increasingly affected by the surrounding electromagnetic environment. The industry has developed relevant electromagnetic compatibility specifications to ensure that commercially available devices have a certain level of immunity to interference from the surrounding electromagnetic environment, known as immunity. To conduct standardized testing of this immunity, a standard electromagnetic environment must be established. This setup typically consists of a signal generator, amplifier, RF cables, transceiver antennas, and an electromagnetically shielded room for the device under test. During these tests, the device under test is placed in a specific workspace within the electromagnetically shielded room. An electromagnetic signal is generated by a signal generator, amplified by an amplifier, and then transmitted by an antenna within the room, injecting electromagnetic waves into the room to create a standard electromagnetic environment. The device under test is then observed to see if it can operate normally in this complex electromagnetic environment, serving as the standard for passing the test.

[0003] One difficulty in arranging the above-mentioned test environment is that the electromagnetic waves emitted by the antenna are directional, and only one side of the device under test faces the antenna at the same time. That is, only the side of the device under test facing the antenna is interfered with by the electromagnetic wave signal. Therefore, it is difficult to generate a uniform electromagnetic field in the three-dimensional surrounding space of the device under test and simultaneously act on the device under test.

[0004] The optimal solution is to install an electromagnetic wave reflector within the shielded room. This allows the electromagnetic waves emitted by the antenna to undergo multiple reflections within the shielded room, thereby forming a uniform electromagnetic field. This type of shielded room with an electromagnetic wave reflector is called a reverberation chamber, and the electromagnetic wave reflector within it is called an agitator or reflection unit. To achieve uniform electromagnetic field, the agitator is typically made of irregular, highly reflective metal plates that can reciprocate or rotate.

[0005] Conventional reverberation chambers use horizontal and vertical agitators in "W" and "Z" configurations. Figure 1A stirrer includes a motor (not shown), a rotating shaft 1, and reflective sheets 11 welded to the circumferential wall of the rotating shaft 1. The reflective sheets 11 are made of a metallic conductor to reflect electromagnetic waves. There are multiple reflective sheets 11, all arranged in sequence along the axial direction of the rotating shaft 1 and connected end to end. Any two adjacent reflective sheets 11 are inclined relative to each other. The rotating shaft 1 is rotatably connected to the wall of the reverberation chamber via bearings. The motor is fixed to the wall of the reverberation chamber, and its output shaft is connected to the rotating shaft 1 to drive the rotating shaft 1, thereby driving the reflective sheets 11 to rotate about the axis of the rotating shaft 1.

[0006] Conventional reverberation chamber agitators are suitable for small reverberation chambers and have design and structural limitations, such as the difficulty in managing shielding effectiveness at the point where the shaft penetrates the wall, and the difficulty in controlling the concentricity and levelness of large and medium-sized agitators. To address this challenge, this application discloses a special-shaped hub reflector unit suitable for large, medium, and small reverberation chambers. This unit, designed to accommodate reverberation chambers of various sizes, provides a highly uniform electromagnetic field to meet testing needs. Summary of the Invention

[0007] The purpose of this application is to provide a special-shaped hub reflection unit that can adapt to reverberation chambers of various types and sizes while providing the reverberation chamber with an electromagnetic field with high field uniformity.

[0008] The special-shaped hub reflector unit provided in this application adopts the following technical solution:

[0009] A special-shaped hub reflection unit includes a special-shaped impeller, a driving member for driving the special-shaped impeller to rotate, and a support for supporting the special-shaped impeller; the special-shaped impeller includes a rotating shaft and a special-shaped wheel arranged on the peripheral wall of the rotating shaft, and the rotating shaft is rotatably connected to the support; the special-shaped wheel includes at least two blade plates in different planes, and all of the blade plates form multiple reflection surfaces; the blade plates are scattered with a number of metal reflection plates for reflecting electromagnetic waves.

[0010] By adopting the above technical solution, all metal reflectors are dispersed on the blade plate, which helps increase the number of reflective surfaces on the shaped wheel for reflecting electromagnetic waves. It also improves the randomness of the distribution position and shape of the reflective surfaces, thereby improving the randomness of the transmission path of the electromagnetic waves after being reflected by the reflective surfaces, thereby improving the uniformity of the distribution of electromagnetic waves in the reverberation chamber. Therefore, the number of shaped wheels can be reduced, thereby reducing the overall volume of the reflective unit and adapting to reverberation chambers of various sizes. At the same time, the drive member is mounted on the support; compared with the related art method of installing the rotating shaft through the wall, it helps reduce the possibility of electromagnetic waves being transmitted into the hole in the wall and causing electromagnetic wave losses. In addition, the structural arrangement of the shaped wheel enables the shaped wheel to reflect a large amount of electromagnetic wave signals to various locations in the reverberation chamber when it rotates, thereby changing the transmission direction of the electromagnetic wave signals inside the reverberation chamber and allowing the electromagnetic wave signals to undergo multiple reflections in the reverberation chamber to form a uniform field.

[0011] Optionally, the special-shaped wheel is formed by crossing two blade plates, the special-shaped wheel is arranged in a centrally symmetrical manner, and the rotating shaft passes through the axis of the special-shaped wheel.

[0012] By adopting the above technical solution, the rotation stability of the special-shaped wheels arranged in a centrally symmetrical manner can be improved.

[0013] Optionally, a reinforcement plate is connected between the two blade plates.

[0014] By adopting the above technical solution, the reinforcing plate can increase the structural strength of the special-shaped wheel, making it more solid.

[0015] Optionally, the reinforcing plates located in the large angle region between the two blade plates are evenly distributed in a star shape, and the center of the star shape is located on the axis of the rotating shaft.

[0016] Optionally, the plate surface of the reinforcing plate located in the small angle region between the two blade plates is parallel to the axis of the rotating shaft.

[0017] By adopting the above technical solution, the rotation stability of the anisotropic impeller can be further improved.

[0018] Optionally, the blade plate is made of wave-transmitting material.

[0019] By adopting the above technical solution, the metal reflector can be arranged inside the blade plate to improve the flatness of the surface of the blade plate; the electromagnetic wave signal can penetrate the wave-transparent material and reach the metal reflector inside the blade plate.

[0020] Optionally, the support is provided with a fixed shell for accommodating the special-shaped wheel, and the fixed shell is connected to a mounting shell for covering the special-shaped wheel; the fixed shell and the mounting shell are both made of wave-transmitting material.

[0021] By adopting the above technical solution, the fixed shell and the mounting shell cooperate with each other to set the special-shaped wheel cover inside, thereby reducing the possibility of the special-shaped wheel hitting the operator and improving the safety of operation. The manufacturing materials of the fixed shell and the mounting shell both include wave-transparent materials. On the one hand, they allow electromagnetic waves to pass through the fixed shell or the mounting shell, reducing the obstruction of the fixed shell or the mounting shell to the transmission of electromagnetic waves; on the other hand, they can reduce the need to open through holes in the fixed shell or the mounting shell for electromagnetic waves to pass through. The mounting shell and the fixed shell can cooperate with each other to seal the special-shaped wheel inside, thereby reducing the possibility of the special-shaped wheel rotating and causing disturbances in the airflow in the reverberation chamber, thereby reducing the risk of the device under test or other working equipment to fall over.

[0022] Optionally, a connecting assembly is connected between the fixed shell and the support, and the fixed shell is connected to the support through the connecting assembly; the connecting assembly includes a connecting plate, a support screw and a fixed screw rotatably connected to the connecting plate, a support limit plate threadedly connected to the support screw, a fixed limit plate threadedly connected to the fixed screw, a support rod connected to the support, and a fixed rod connected to the fixed shell; the support rod is provided with a support hole for inserting the support screw, and the fixed rod is provided with a fixing hole for inserting the fixing screw; the length direction of the support hole is arranged along the axial direction of the rotating shaft, and the length direction of the fixing hole is arranged along the radial direction of the rotating shaft.

[0023] By adopting the above technical solution, the support screw can move along the length direction of the support hole, and the fixed screw can move along the length direction of the fixed hole to realize the axial and radial adjustment of the fixed shell along the rotating axis, so as to reduce the possibility of collision between the special-shaped wheel and the inner wall of the fixed shell; when the adjustment of the fixed shell is completed, the fixed shell can be fixed by tightening the support screw and the fixed screw, which is simple and convenient to operate.

[0024] Optionally, a tension screw and a traction screw are provided on one side of the fixed shell, the length direction of the tension screw is arranged along the axial direction of the rotating shaft, and the length direction of the traction screw is arranged along the radial direction of the rotating shaft; the tension screw and the traction screw are both provided with an abutment plate for abutting against the side of the support away from the fixed shell; the tension screw and the traction screw are both threadedly connected with a fixing nut for abutting against the side wall of the abutment plate away from the fixed shell.

[0025] By adopting the above technical solution, during the adjustment of the fixed housing, rotating the fixing nut can cause the traction screw and the tension screw to move along their own length directions, thereby driving the fixed housing to move axially and radially along the rotation axis, thereby achieving adjustment of the fixed housing's position, which is convenient and labor-saving. At the same time, when the fixing nut is tightened, the abutment plate can abut against the support to support the fixed housing, which helps to further improve the stability of the connection between the fixed housing and the support.

[0026] Optionally, outer side walls of the fixed shell and the mounting shell are both provided with ridges.

[0027] By adopting the above technical solution, the convex ridges serve as reinforcing ribs to improve the structural strength of the mounting shell and the fixing shell.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. All metal reflectors are dispersed on the blades, which helps to increase the randomness of the transmission path of the electromagnetic waves after being reflected by the reflective surface, thereby improving the uniformity of the electromagnetic wave distribution in the reverberation chamber. Therefore, the number of special-shaped wheels can be reduced, thereby reducing the overall volume of the reflective unit and adapting to reverberation chambers of various sizes.

[0030] 2. The blade plates are arranged crosswise, and the center of the blade plates is located on the axis of the rotating shaft, which is beneficial to improving the consistency of the centrifugal force in all directions applied to the rotating shaft, thereby improving the stability of the connection between the rotating shaft and the support, to ensure the stability of the rotation of the blade plates driven by the rotating shaft, and to increase the rotation speed of the rotating shaft, so as to increase the number of reflections of electromagnetic waves by the metal reflector in the blade plate, thereby improving the reflection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram used to illustrate the structure of an agitator in the related art.

[0032] Figure 2 This is a schematic diagram of the overall structure of a special-shaped wheel hub reflection unit according to an embodiment of the present invention.

[0033] Figure 3 This is a schematic diagram showing the positional relationship between the special-shaped impeller and the fixed casing with the mounting casing removed.

[0034] Figure 4 yes Figure 3 Enlarged view of part A in .

[0035] Figure 5 An exploded diagram showing the structure of connected components.

[0036] Figure 6 It is a schematic diagram used to show the positions of the tension screw and the traction screw.

[0037] Figure 7 It is a schematic diagram used to show the structure of the special-shaped wheel.

[0038] In the figure, 1, rotating shaft; 11, reflecting leaf; 2, special-shaped impeller; 21, rotating shaft; 22, special-shaped wheel; 221, blade plate; 2211, reinforcing plate; 3, driving member; 4, support; 41, supporting frame; 42, triangular support frame; 421, connecting rod; 422, supporting foot; 5, fixed housing; 51, clearance groove; 52, mounting housing; 53, ridge; 54, tension connector; 541, tension mounting bar; 542 , tension mounting frame; 543, abutment plate; 544, fixing nut; 55, tension screw; 56, traction screw; 561, traction connector; 6, connection assembly; 61, connection plate; 62, support screw; 63, fixing screw; 64, support limit plate; 641, support screw hole; 65, fixing limit plate; 651, fixing screw hole; 66, support rod; 661, support hole; 67, fixing rod; 671, fixing hole. DETAILED DESCRIPTION

[0039] The following is combined with Figure 2 -Attached Figure 7 , further details of this application are given.

[0040] A special-shaped wheel hub reflector unit, referring to Figure 2 and Figure 3 , including a special-shaped impeller 2, a driving member 3 and a support 4. The support 4 includes a support frame 41 and triangular support frames 42 arranged on the upper surfaces of both ends of the support frame 41, and a connecting rod 421 is welded and fixed between the lower ends of the two triangular support frames 42. The lower ends of the legs of the triangular support frames 42 are fixedly connected to support feet 422 by bolts, and the support feet 422 are fixed to the support frame 41 by bolts. The special-shaped impeller 2 is located between the two triangular support frames 42; the special-shaped impeller 2 includes a rotating shaft 21 and a special-shaped wheel 22, and the special-shaped wheel 22 is arranged on the peripheral wall of the rotating shaft 21. One end of the rotating shaft 21 is rotatably connected to the upper end of one of the triangular support frames 42 through a bearing, and the other end is rotatably connected to the upper end of the other triangular support frame 42 through a bearing.

[0041] Reference Figure 2 and Figure 3 A fixed housing 5 is disposed between the two triangular supports 42. The fixed housing 5 has a semicircular cross-section along the axis of the rotating shaft 21. The axis of the fixed housing 5 coincides with the axis of the rotating shaft 21, and each end of the fixed housing 5 is provided with a clearance slot 51 for the rotating shaft 21 to pass through. In this embodiment, the opening of the fixed housing 5 is tilted downward along one side of the radial direction of the rotating shaft 21, and a connecting assembly 6 is provided on each side of the opening of the fixed housing 5 to secure the fixed housing 5 to the triangular supports 42 located in the corresponding position. The underside of the shaped wheel 22 is located within the fixed housing 5.

[0042] Reference Figure 2 and Figure 3 The upper end of the fixed housing 5 is provided with a mounting housing 52, which has the same shape as the fixed housing 5. The mounting housing 52 is connected to the fixed housing 5 via a flange to seal the shaped wheel 22 therein. The fixed housing 5 and the mounting housing 52 are both made of wave-transmitting materials. The corresponding wave-transmitting materials can be glass fiber or other polymer materials, or silicon nitride ceramics, silicon carbide ceramics, or other wave-transmitting materials. In this embodiment, the manufacturing material of the fixed housing 5 and the mounting housing 52 is both glass fiber. The outer peripheral walls of the fixed housing 5 and the mounting housing 52 are both integrally formed with a plurality of ridges 53 to enhance the structural strength of the fixed housing 5 and the mounting housing 52.

[0043] Reference Figure 2 and Figure 3 The shaped wheel 22 is used to reflect electromagnetic waves; the driving member 3 includes a motor, the driving member 3 is fixed to the triangular support frame 42 by bolts, and the output shaft of the driving member 3 is connected to the rotating shaft 21 to drive the shaped wheel 22 to rotate, so that the shaped wheel 22 can randomly reflect electromagnetic wave signals in multiple directions.

[0044] Reference Figure 4 and Figure 5 The connection assembly 6 includes a connection plate 61, a support screw 62, a fixed screw 63, a support limit plate 64, a fixed limit plate 65, a support rod 66, and a fixed rod 67. The connection plate 61 is L-shaped, with through holes formed on both sides of the connection plate 61. The support screw 62 and the fixed screw 63 are both bolts. The fixed screw 63 is inserted into the through hole on one side of the connection plate 61, and the support screw 62 is inserted into the through hole on the other side of the connection plate 61.

[0045] Reference Figure 4 and Figure 5 The support rod 66 is located on the leg of the triangular support frame 42 near the flange of the fixed shell 5, and the length direction of the support rod 66 is set along the axial direction of the fixed shell 5. The support rod 66 is provided with a support hole 661 along its own thickness direction, and the length direction of the support hole 661 is set along the length direction of the support rod 66. The support limit plate 64 is located between the support rod 66 and the leg of the triangular support frame 42. Both ends of the support rod 66 are bent toward the leg direction of the triangular support frame 42 and welded to the leg of the triangular support frame 42. A support screw hole 641 is provided through the support limit plate 64; after the support screw 62 is passed through the support hole 661 and screwed into the support screw hole 641, the support screw 62 is tightened to fix the connecting plate 61 to the triangular support frame 42.

[0046] Reference Figure 4 and Figure 5Similarly, the length of the fixing rod 67 is arranged along the radial direction of the fixed housing 5. The fixing stop plate 65 is located between the fixing rod 67 and the fixed housing 5, and both ends of the fixing rod 67 are fixedly connected to the outer wall of the fixed housing 5 by bolts. The fixing rod 67 is provided with a fixing hole 671 extending therethrough, and the length of the fixing hole 671 is arranged along the length of the fixing rod 67. The fixing stop plate 65 is provided with a fixing screw hole 651. By inserting the fixing screw 63 through the fixing hole 671 and tightening the fixing screw 63, the connecting plate 61 is fixed to the fixed housing 5, thereby connecting the fixed housing 5 to the triangular support frame 42.

[0047] Reference Figure 3 and Figure 6 A tension connection member 54 is provided on the outer wall of the fixed housing 5 on the side of the driving member 3 facing away from the connecting assembly 6. The tension connection member 54 includes a tension mounting bar 541, a tension mounting bracket 542, an abutment plate 543, and a fixing nut 544. The tension mounting bar 541 is integrally formed with the fixed housing 5, and the tension mounting bracket 542 is fixedly connected to the tension mounting bar 541 by bolts. The tension mounting bracket 542 is installed with a "U-shaped" bolt. The screw rod of the "U"-shaped bolt is the tension screw 55, and the length direction of the tension screw 55 is arranged along the axial direction of the fixed housing 5. The abutment plate 543 is sleeved on the end of the tension screw 55 away from the fixed housing 5 and is located on the side of the triangular support bracket 42 facing away from the fixed housing 5; the fixing nut 544 is threadedly connected to the tension screw 55 and is located on the side of the abutment plate 543 facing away from the fixed housing 5. By rotating the fixing nut 544 , the contact plate 543 can be pressed against the triangular support frame 42 to drive the fixed housing 5 to move.

[0048] Reference Figure 3 and Figure 6 A traction screw 56 is provided on the fixed housing 5 at a position on the side of the driving member 3 near the connecting assembly 6. The structure of the traction screw 56 is the same as that of the tension screw 55, and the traction screw 56 is connected to the fixed housing 5 via a traction connector 561. The structure of the traction connector 561 is the same as that of the tension connector 54, but the length of the traction screw 56 is provided along the radial direction of the fixed housing 5. This allows the position of the fixed housing 5 relative to the triangular support frame 42 to be adjusted along the radial direction of the fixed housing 5.

[0049] Reference Figure 7The shaped wheel 22 includes two blade plates 221. The two blade plates 221 are located in different planes. The two blade plates 221 are tilted and intersected with each other so that the two blade plates 221 intersect to form a hub shape, thereby forming multiple reflective surfaces. The centers of the two blade plates 221 coincide with each other so that the shaped wheel 22 is arranged in a centrally symmetrical manner, and the rotating shaft 21 passes through the axis of the shaped wheel 22. In this embodiment, the blade plates 221 are circular plates. A plurality of reinforcing plates 2211 are provided in the large angle region and the small angle region formed between the two blade plates 221. The reinforcing plates 2211 are integrally formed with the blade plates 221. The reinforcing plates 2211 in the large angle region are evenly distributed in a star shape, and the center of the star-shaped structure formed by the reinforcing plates 2211 is located on the axis of the rotating shaft 21. The plate surface of the reinforcing plates 2211 in the small angle region is parallel to the axis of the rotating shaft 21. In another embodiment, the number of the blade plates 221 may be three or four or more, and all the blade plates 221 are arranged to cross each other so as to increase the number of reflective surfaces.

[0050] Reference Figure 7 The blade plate 221 and the reinforcement plate 2211 are both made of wave-transmitting material. Metal reflectors (not shown) are installed within the blade plate 221 and the reinforcement plate 2211 to reflect electromagnetic wave signals. In this embodiment, the blade plate 221 and the reinforcement plate 2211 are made of fiberglass. The metal reflectors are spiral-shaped and can be made of copper, aluminum, or other materials capable of reflecting electromagnetic waves. In this embodiment, the metal reflectors are made of aluminum. During injection molding of the special-shaped impeller, the metal reflectors can be mixed with the molding material and then injection-molded into the blade plate 221 and the reinforcement plate 2211. This helps increase the randomness of the position and shape of the metal mounting plates within the blade plate 221 and the reinforcement plate 2211. In another embodiment, the metal reflectors can be fixed to the surface of the blade plate 221 or the reinforcement plate 2211 by bonding. The spiral-shaped fragments can be produced by cutting or other processing techniques, which are not described in detail in this application.

[0051] In another embodiment, the two intersecting blade plates 221 may also be manufactured by bonding four semicircular plates to each other; similarly, the reinforcing plate 2211 may also be connected to the blade plates 221 by a bonding process.

[0052] The implementation principle of the embodiment of this application is:

[0053] When the driver 3 rotates the shaped wheel 22, the metal reflective sheet rotates around the axis of the rotating shaft 21. Electromagnetic waves within the reverberation chamber can pass through the blades 221 and the reinforcing plate 2211 and come into contact with the metal reflective sheet within the blades 221 and the reinforcing plate 2211. The metal reflective sheet reflects the electromagnetic waves, changing their direction of propagation and causing them to propagate in random directions, thereby improving the uniformity of their distribution within the reverberation chamber. The randomly distributed metal reflective sheets increase the area of ​​the electromagnetic wave reflection surface and provide a variety of reflective surfaces in different positions and configurations, which helps reduce the volume of the shaped wheel 22. This reduces the space occupied by the reflective unit within the reverberation chamber, allowing the reflective unit to be used in reverberation chambers of varying sizes.

[0054] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A special-shaped wheel hub reflection unit, characterized by: The invention comprises a special-shaped impeller (2), a driving member (3) for driving the special-shaped impeller (2) to rotate, and a support (4) for supporting the special-shaped impeller (2); the special-shaped impeller (2) comprises a rotating shaft (21) and a special-shaped wheel (22) arranged on the peripheral wall of the rotating shaft (21), the rotating shaft (21) being rotatably connected to the support (4); the special-shaped wheel (22) comprises at least two blade plates (221) in different planes, the two blade plates (221) are inclined and cross each other, so that the two blade plates (221) intersect to form a hub shape, thereby forming a plurality of reflection surfaces; the blade plates (221) ) A plurality of metal reflective sheets for reflecting electromagnetic waves are scattered and arranged, the shaped wheel (22) is arranged in a central symmetrical manner, the rotating shaft (21) passes through the axis of the shaped wheel (22), a reinforcing plate (2211) is connected between the two blade plates (221), the reinforcing plates (2211) located in the large angle area between the two blade plates (221) are evenly distributed in a star shape, and the center of the star shape is located on the axis of the rotating shaft (21), and the plate surface of the reinforcing plate (2211) located in the small angle area between the two blade plates (221) is parallel to the axis of the rotating shaft (21).

2. The special-shaped hub reflective unit according to claim 1, characterized in that: The blade plate (221) is made of wave-transmitting material.

3. The special-shaped hub reflection unit according to claim 1, characterized in that: The support (4) is provided with a fixed housing (5) for accommodating the special-shaped wheel (22), and the fixed housing (5) is connected to a mounting housing (52) for covering the special-shaped wheel (22); the fixed housing (5) and the mounting housing (52) are both made of wave-transmitting material.

4. The special-shaped hub reflection unit according to claim 3, characterized in that: A connecting assembly (6) is connected between the fixed housing (5) and the support (4), and the fixed housing (5) is connected to the support (4) through the connecting assembly (6); the connecting assembly (6) comprises a connecting plate (61), a supporting screw (62) and a fixing screw (63) rotatably connected to the connecting plate (61), a supporting limit plate (64) threadedly connected to the supporting screw (62), a fixing limit plate (65) threadedly connected to the fixing screw (63), a supporting rod (66) connected to the support (4), and a fixing rod (67) connected to the fixed housing (5); the supporting rod (66) is provided with a supporting hole (661) for inserting the supporting screw (62), and the fixing rod (67) is provided with a fixing hole (671) for inserting the fixing screw (63); the length direction of the supporting hole (661) is provided along the axial direction of the rotating shaft (21), and the length direction of the fixing hole (671) is provided along the radial direction of the rotating shaft (21).

5. The special-shaped hub reflection unit according to claim 4, characterized in that: A tension screw (55) and a traction screw (56) are provided on one side of the fixed shell (5), the length direction of the tension screw (55) is arranged along the axial direction of the rotating shaft (21), and the length direction of the traction screw (56) is arranged along the radial direction of the rotating shaft (21); the tension screw (55) and the traction screw (56) are both sleeved with an abutment plate (543) for abutting against the side of the support (4) away from the fixed shell (5); the tension screw (55) and the traction screw (56) are both threadedly connected with a fixing nut (544) for abutting against the side wall of the abutment plate (543) away from the fixed shell (5).

6. The special-shaped hub reflection unit according to claim 3, characterized in that: The outer side walls of the fixed shell (5) and the installation shell (52) are both provided with ridges (53).

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