High-precision feed source height adjusting device based on thread rotation adjustment

Abstract

The invention relates to the technical field of communication equipment, and provides a high-precision feed source height adjusting device based on thread rotation adjustment, which comprises a parabolic antenna, a feed source arranged in the middle of the parabolic antenna and a mounting mechanism for mounting the feed source on the parabolic antenna, the mounting mechanism comprises a mounting base and a supporting assembly connected to the mounting base and the parabolic antenna, a mounting screw protrudes from the lower surface of the feed source, a first threaded hole for threaded connection of the mounting screw is formed in the upper surface of the mounting base, and the length of the first threaded hole is larger than or equal to that of the mounting screw; and a limiting mechanism for limiting the rotation of the feed source is arranged on the mounting base. The feed source is in threaded connection with the first threaded hole of the mounting base through the mounting screw, fine adjustment of the height of the feed source is achieved, the height adjustment precision of the feed source is guaranteed, the problems that an original design scheme excessively depends on the thickness of a gasket, and the adjustment precision is insufficient are solved, and micron-level height adjustment can be achieved.

Description

Technical Field

[0001] This application relates to the technical field of communication equipment, and in particular to a high-precision feed height adjustment device based on threaded rotation adjustment. Background Technology

[0002] In satellite communication and data transmission antenna systems, the relative height between the feed hood and the reflector is a key parameter affecting antenna electrical performance (such as gain, beamwidth, sidelobe level, and return loss). Currently, there are two main methods commonly used in the industry for adjusting the feed hood height: Mechanical shim method: The height is changed by adding or removing shims under the feed support structure. Although this method is simple in structure, the adjustment accuracy is low, and each adjustment requires repeated disassembly and reassembly of the fastening screws, which is cumbersome, inefficient, and carries the risk of the feed falling off during disassembly and reassembly.

[0003] Overall structural modification method: After testing and determining the required height, the dimensions of the supporting structure are directly modified. This method is irreversible; any adjustment error will lead to component scrapping, material waste, and project delays. In summary, existing technologies generally suffer from insufficient adjustment precision, long debugging cycles, and poor repeatability, making it difficult to meet the demands of rapid product delivery and mass production. Therefore, there is an urgent need for a feed height adjustment device that can achieve high precision, high efficiency, stepless fine-tuning, and easy operation. Summary of the Invention

[0004] To address the above issues, this application provides a high-precision feed height adjustment device based on thread rotation adjustment.

[0005] This application provides a high-precision feed height adjustment device based on thread rotation adjustment, which adopts the following technical solution: A high-precision feed height adjustment device based on screw rotation adjustment includes a parabolic antenna, a feed located in the middle of the parabolic antenna, and a mounting mechanism for mounting the feed to the parabolic antenna. The mounting mechanism includes a mounting base and a support component connecting the mounting base and the parabolic antenna. A mounting screw protrudes from the lower surface of the feed. A first threaded hole for threaded connection of the mounting screw is provided on the upper surface of the mounting base. The length of the first threaded hole is greater than or equal to the length of the mounting screw. A limiting mechanism for restricting the rotation of the feed is provided on the mounting base.

[0006] By adopting the above technical solution, the rotating feed source drives the mounting screw threaded into the first threaded hole, moving it axially along the first threaded hole. One rotation moves the feed source by one thread pitch. The feed source can be rotated to a suitable height position as needed, and then a limiting mechanism is used to fix the adjusted height. This method improves installation efficiency compared to existing technologies.

[0007] The feed source is threaded to the first threaded hole of the mounting base via a mounting screw. By rotating the feed source body, the feed source can be precisely moved up and down along the thread, thus achieving fine-tuning of the feed source height. This ensures the accuracy of feed source height adjustment and overcomes the problems of the original design, which relied too much on shim thickness and had insufficient adjustment precision. It can achieve micron-level height adjustment, ensuring stable antenna performance across different frequency bands. Simultaneously, a limiting mechanism is included to restrict feed source rotation, fixing it after adjustment to the target height and reducing loosening caused by vibration or environmental changes. Unlike the original design, there is no need for repeated disassembly and structural modifications; adjustment can be completed simply by rotating the feed source. This shortens the testing cycle, thereby shortening the delivery cycle. It also reduces the use of screws, saving assembly time and reducing costs. Furthermore, the antenna performance is improved, which is evident during the testing phase.

[0008] Preferably, the thread pitch on the mounting screw is 0.5mm-1mm.

[0009] By adopting the above technical solution, setting the thread pitch of the mounting screw to 0.5mm - 1mm can balance adjustment sensitivity and structural strength, ensure the accuracy of feed height adjustment, achieve high-precision, high-efficiency, stepless fine-tuning and easy-to-operate feed height adjustment, improve antenna performance indicators and shorten testing and delivery cycle.

[0010] Preferably, the limiting mechanism includes a limiting ring and a fixing component for fixing the limiting ring on the mounting base, wherein the limiting ring has a through groove for the feed source to pass through.

[0011] By adopting the above technical solution, the limiting ring of the limiting mechanism can be fixed to the mounting base by the fixing component. The through slot on the limiting ring allows the feed to pass through. In this way, after the feed is rotated to the target height by the mounting screw and the first threaded hole of the mounting base, the limiting ring can limit the rotation of the feed, reduce the rotation of the feed due to vibration or environmental changes, and ensure that the feed is stably in the adjusted height position, thereby maintaining the stability of the antenna's electrical performance. At the same time, the setting of the limiting ring and the fixing component makes the structure of the entire device more stable, which helps to improve the reliability and stability of the feed height adjustment device.

[0012] Preferably, the limiting ring includes two symmetrically arranged limiting plates, with a through groove formed between the two limiting plates for the feed source to pass through. The limiting plates abut against the feed source, and the feed source has a regular polygonal cross-section along the radial direction.

[0013] By adopting the above technical solution, the limiting ring is designed as two symmetrically arranged limiting plates, which together form a through slot for the feed source to pass through. The limiting plates abut against the feed source, and in conjunction with the feed source with a regular polygonal cross-section, the rotation of the feed source can be better restricted, reducing the use of screws and saving assembly time. At the same time, the height of the feed source can be adjusted simply by adjusting the direction of the limiting plates. Furthermore, since the cross-section of the feed source is a regular polygonal arrangement along the radial direction, i.e., it has n faces, rotating one face will result in one-nth of the pitch, thus allowing for higher adjustment precision.

[0014] Preferably, the opposing surfaces of the two limiting plates are respectively provided with mutually cooperating protrusions and grooves.

[0015] By adopting the above technical solution, when using the limiting plate to restrict the rotation of the feed source, the protrusions and grooves on the opposite surfaces of the two limiting plates cooperate with each other, which can make the connection between the two limiting plates tighter and more stable, thereby more effectively restricting the rotation of the feed source and ensuring the stability after the feed source height is adjusted.

[0016] Preferably, the limiting mechanism further includes a clamping component for abutting against the feed source. Several clamping components are arranged at intervals around the axis of the feed source. Each clamping component includes a limiting strip abutting against the side wall of the feed source, a connecting rod connected to the limiting strip, and a pushing member that interacts with the fixing component to convert axial force into radial pushing force.

[0017] By adopting the above technical solution, the dimensions of the slot through which the limiting ring passes may not be perfectly matched during the processing, and there may be a gap between it and the feed. To address this, a clamping assembly is provided. After the feed height is adjusted, multiple clamping assemblies spaced around the feed axis provide a clamping effect on the feed. The limiting strip in the clamping assembly abuts against the feed sidewall. When the fixing assembly applies axial force, the pushing component converts this axial force into a radial pushing force, which is transmitted to the limiting strip through the connecting rod. This makes the limiting strip abut more tightly against the feed sidewall, thereby better restricting feed rotation, ensuring the stability of the feed at the current height position, reducing feed loosening caused by vibration or environmental changes, and thus ensuring the stable performance of the antenna system.

[0018] Preferably, the pushing member includes an abutting rod that abuts against the connecting rod and a spring coaxially sleeved on the connecting rod. The abutting rod has a guide surface on its surface away from the connecting rod. The fixing assembly includes a second bolt threaded through the limiting ring. The limiting ring has a first slot for inserting the connecting rod on its inner wall of the through groove. The upper surface of the limiting ring has a through groove for the second bolt to pass through. The first slot communicates with the through groove. The abutting rod extends into the through groove. When the second bolt is tightened, its end presses against the guide surface, thereby pushing the abutting rod against the connecting rod. The spring is used to push the limiting strip to move away from the feed source.

[0019] By adopting the above technical solution, when the second bolt is tightened, its end presses against the guide surface of the abutment rod, converting the axial force into a radial pushing force. This pushes the abutment rod against the connecting rod, thereby causing the limiting strip to press against the feed source, achieving reliable fixation of the feed source, further reducing feed source rotation, and ensuring stability after feed source height adjustment. Simultaneously, the spring is used to push the limiting strip away from the feed source. When the feed source height needs to be adjusted again, the second bolt is loosened, and the spring force allows the limiting strip to return to its original position, facilitating subsequent adjustment operations.

[0020] Preferably, the second bolt includes, from top to bottom, a first threaded segment that is threadedly connected to the limiting ring, a connecting segment, and a connecting segment that is threadedly connected to the mounting base. The diameter of the connecting segment is smaller than the diameter of the first threaded segment / second threaded segment. The connecting segment is smoothly transitioned into an arc shape near the edges of the first threaded segment and the second threaded segment so as to abut against the guide surface.

[0021] By adopting the above technical solution, the second bolt is designed with a specific structure. The diameter of its connecting section is smaller than that of the first and second threaded sections, and the edge is smoothly transitioned into an arc. When it abuts against the abutting rod, the feed source can be initially positioned so that the feed source can be adjusted before the second bolt is tightened. When it is fully tightened, the first threaded section abuts against the abutting rod, thereby pressing against the feed source to ensure that the feed source is stably fixed after being adjusted to the target height. This reduces loosening caused by vibration or environmental changes and further improves the stability and reliability of the feed source height adjustment device.

[0022] Preferably, a flexible element is provided on the outer peripheral wall of the limiting strip / feed source, and a limiting part that abuts against the flexible element is provided on the outer peripheral wall / limiting strip of the feed source.

[0023] By adopting the above technical solution, a flexible component is provided on the outer peripheral wall of the limiting strip or the feed, and a limiting part that abuts against the flexible component is provided on the outer peripheral wall of the feed or the limiting strip. This allows the elastic buffering effect of the flexible component to reduce rigid collisions between the limiting mechanism and the feed when the limiting mechanism limits the feed, thus reducing damage to the feed and ensuring its integrity and stability. Simultaneously, the limiting part ensures that the flexible component is in a suitable position, better fulfilling its buffering and limiting functions, further improving the reliability and stability of the feed height adjustment device, and ensuring stable antenna performance under different operating conditions.

[0024] It is also suitable for feed sources with a circular cross-section, and axial locking can be achieved through friction.

[0025] Preferably, the flexible component is an airbag, the limiting ring is provided with an air supply pipe connected to the airbag, the limiting plate is provided with an air storage cavity connected to the air supply pipe, a piston plate is slidably connected in the air storage cavity, a push rod is connected to the piston plate, the limiting ring has a second slot connected to the through groove, the push rod is slidably inserted into the second slot, a guide surface is provided at one end of the push rod near the second bolt, and the push rod is located below the pushing component.

[0026] By adopting the above technical solution, the flexible component is configured as an airbag. Since the push rod is located below the pushing component, when the second bolt is tightened, the end of the second bolt first acts on the pushing component to push the limiting strip and the airbag to abut against the outer peripheral wall of the feed. As the second bolt rotates, it acts on the push rod to move it closer to the feed. The push rod slides in the second slot, thereby pushing the piston plate to move in the gas storage chamber, allowing the gas in the gas storage chamber to enter the airbag through the gas supply pipe, causing the airbag to inflate. The inflated airbag abuts against the limiting part, thus providing a more stable limiting effect on the feed, effectively reducing the loosening of the feed due to vibration or environmental changes, ensuring the stability of the feed height, and further ensuring the adjustment accuracy and antenna performance stability of the high-precision feed height adjustment device based on threaded rotation adjustment.

[0027] In summary, this application has the following beneficial effects: 1. The feed source is connected to the first threaded hole of the mounting base by the mounting screw. The feed source body can be rotated along the thread to achieve precise vertical movement, which can realize micron-level height adjustment, ensure the stable performance of the antenna in different frequency bands, and improve the accuracy of feed source height adjustment. 2. No need for repeated disassembly or structural modifications; height adjustment can be completed simply by rotating the feed source, shortening the testing and delivery cycles and improving testing efficiency. 3. A limit mechanism is set on the mounting base to restrict the rotation of the feed source, which reduces the use of screws, saves assembly time, and only requires adjusting the limit mechanism when adjusting the height, making the operation simple. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application; Figure 2 yes Figure 1 A magnified view of part A in the middle; Figure 3 This is an exploded structural diagram of Embodiment 1 of this application; Figure 4 This is a side view of the mounting screw structure in Embodiment 1 of this application; Figure 5 This is a schematic diagram of the limiting ring structure in Embodiment 1 of this application; Figure 6This is a schematic diagram of the structure of Embodiment 2 of this application; Figure 7 This is a side cross-sectional view of Embodiment 2 of this application; Figure 8 yes Figure 7 A magnified view of part B in the middle section; Figure 9 This is a schematic diagram of the structure of Embodiment 3 of this application; Figure 10 This is a structural schematic diagram of Embodiment 4 of this application; Figure 11 This is a schematic diagram of the structure after combining Embodiment 4 and Embodiment 2 of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Parabolic antenna; 2. Feed source; 21. Mounting screw; 22. Limiting part; 3. Mounting mechanism; 4. Mounting base; 41. Mounting slot; 42. First threaded hole; 43. Second threaded hole; 5. Support assembly; 51. Support rod; 511. First fixing part; 512. Bending part; 513. Second fixing part; 52. Fixing element; 6. Limiting mechanism; 61. Limiting ring; 611. Through slot; 612. First... 613, second slot; 62, fixing component; 621, first threaded section; 622, connecting section; 623, second threaded section; 7, limiting plate; 71, protrusion; 72, groove; 73, air storage chamber; 74, piston plate; 75, push rod; 8, clamping component; 81, limiting strip; 82, pushing component; 821, connecting rod; 822, abutting rod; 823, spring; 9, guide surface; 10, flexible component; 101, air supply pipe. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 -Appendix Figure 11 This application will be described in further detail below.

[0031] This application discloses a high-precision feed height adjustment device based on thread rotation adjustment.

[0032] Example 1: A high-precision feed height adjustment device based on screw rotation adjustment, referring to Figure 1 , Figure 2 It includes a parabolic antenna 1, a feed 2 located in the middle of the parabolic antenna 1, and a mounting mechanism 3 for mounting the feed 2.

[0033] The mounting mechanism 3 includes a mounting base 4 and a support assembly 5 for mounting the mounting base 4 onto the parabolic antenna 1. The mounting base 4 is typically a structural component with sufficient strength and stability. Its material can be metal, such as aluminum alloy, which is lightweight and high-strength; or it can be high-strength plastic, which is low-cost and corrosion-resistant. The mounting base 4 is generally disc-shaped, providing a larger support area and ensuring the stability of the feed 2 installation.

[0034] Reference Figure 2 , Figure 3 The support assembly 5 includes support rods 51 and fixing members 52. In this embodiment, several support rods 51 are spaced apart around the axis of the parabolic antenna 1, specifically four support rods 51 are shown, used to fix the mounting base 4 at the middle position of the parabolic antenna 1. The support rods 51 are generally made of metal rods, and each support rod 51 specifically includes a first fixing part 511 fixedly connected to the inner surface of the parabolic antenna 1, a bent part 512 bent from the first fixing part 511, and a second fixing part 513 fixed to the mounting base 4. The upper surface of the mounting base 4 has a mounting groove 41 for the fixing part to slide and insert. The mounting groove 41 extends to the outer peripheral wall of the mounting base 4 to allow the bent part 512 to pass through. In this embodiment, the cross-section of the second fixing part 513 is a convex block.

[0035] The fixing component 52 is specifically the first bolt, which is threaded through the fixing part to connect with the inner bottom wall of the mounting groove 41, thereby fixing the mounting base 4 and the support rod 51, and installing the mounting base 4 in the middle of the parabolic antenna 1, so that the feed 2 installed later is centered.

[0036] Reference Figure 3 , Figure 4 For the installation between the feed source 2 and the mounting base 4, specifically, a mounting screw 21 protrudes from the lower surface of the feed source 2. In this embodiment, the thread pitch on the mounting screw 21 is 0.5mm-1mm. The upper surface of the mounting base 4 has a first threaded hole 42 for threaded connection of the mounting screw 21. The length of the first threaded hole 42 is greater than or equal to the length of the mounting screw 21, which ensures that the mounting screw 21 has sufficient room to move within the first threaded hole 42, thereby adjusting the height of the feed source 2. The internal thread of the first threaded hole 42 matches the external thread of the mounting screw 21, and the clearance between the two is small to improve the adjustment accuracy. By rotating the body of the feed source 2, the mounting screw 21 rotates within the first threaded hole 42, thereby achieving precise movement of the feed source 2 in the vertical direction, and thus achieving fine adjustment of the height of the feed source 2.

[0037] Furthermore, to reduce the possibility of the feed source 2 rotating due to external forces after installation, i.e., its height changing, this embodiment includes a limiting mechanism 6 on the mounting base 4 to restrict the rotation of the feed source 2. The limiting mechanism 6 restricts the rotation of the feed source 2, achieving a high-precision, high-efficiency, and convenient height adjustment. This is because the feed source 2 can be finely adjusted by rotating it via a threaded connection, while the limiting mechanism 6 ensures that the adjusted feed source 2 remains stable at its current height.

[0038] Specifically, the limiting mechanism 6 includes a limiting ring 61 and a fixing component 62 for fixing the limiting ring 61 to the mounting base 4. The limiting ring 61 has a through groove 611 for the feed source 2 to pass through. In this embodiment, the limiting ring 61 can be configured as follows: Figure 5 As shown, it is arranged in a ring shape, or as... Figure 3 As shown, the limiting ring 61 includes two symmetrically arranged limiting plates 7, with a through groove 611 formed between the two limiting plates 7 for the feed source 2 to pass through. The limiting plate 7 abuts against the feed source 2. Compared with the limiting ring 61, the distance between it and the feed source 2 is relatively small, resulting in better limiting effect and higher adaptability. In this embodiment, the limiting plate 7 is specifically shown.

[0039] Reference Figure 3 Furthermore, the opposing surfaces of the two limiting plates 7 are respectively provided with mutually cooperating protrusions 71 and grooves 72. The design of the protrusions 71 and grooves 72 can increase the connection stability between the two limiting plates 7, making the limiting ring 61 more secure. The protrusion 71 is generally a small columnar structure, and its material is the same as that of the limiting plate 7; the groove 72 is a slot-shaped structure that matches the protrusion 71. When the two limiting plates 7 are installed together, the protrusion 71 is inserted into the groove 72, which serves to position and reinforce the plate.

[0040] Specifically, the fixing component 62 is a second bolt. Several second bolts are spaced around the axis of the feed source 2. Specifically, four second bolts are shown. The upper surface of the mounting base 4 is provided with a second threaded hole 43 for threaded connection of the second bolts.

[0041] In this embodiment, the radial cross-section of the feed source 2 is set as a regular polygon, and the rotation on the axis of the feed source 2 can be restricted by the above limiting mechanism 6.

[0042] The implementation principle of the high-precision feed 2 height adjustment device based on threaded rotation adjustment in this application embodiment is as follows: The device connects the mounting screw 21 of the feed 2 to the threaded hole of the mounting base 4 via a threaded connection. Utilizing the principle of threaded transmission, rotating the feed 2 achieves fine-tuning of its height. This method offers high adjustment precision and ensures stable antenna performance across different frequency bands. Simultaneously, the limiting mechanism 6 reduces rotation of the feed 2 after height adjustment, ensuring adjustment stability. Compared to existing technologies, this device eliminates the need for repeated disassembly and structural modifications; adjustment is completed simply by rotating the feed 2, significantly shortening testing and delivery cycles and meeting the demands of rapid product delivery and mass production.

[0043] Example 2: Reference Figure 6 , Figure 7 The difference from Embodiment 1 is that the limiting mechanism 6 also includes a clamping component 8 for clamping against the feed source 2, and the clamping component 8 is provided at intervals around the axis of the feed source 2.

[0044] Reference Figure 7 , Figure 8 The clamping assembly 8 includes a limiting strip 81 that abuts against the side wall of the feed source 2, a connecting rod 821 connected to the limiting strip 81, and a pusher 82 that interacts with the fixing assembly 62 to convert axial force into radial thrust.

[0045] The limiting strip 81 is generally a long strip structure, which can be a metal strip or a plastic strip with high hardness. A flexible element 10 is provided on the outer peripheral wall of the limiting strip 81 / feed source 2. The flexible element 10 can be a flexible material such as a rubber pad to increase the friction with the feed source 2 and reduce scratches on the feed source 2. The connecting rod 821 is used to connect the limiting strip 81 and the pushing element 82. Its material is generally a metal rod.

[0046] The pushing component 82 specifically includes a connecting rod 821, an abutting rod 822 abutting against the connecting rod 821, and a spring 823 coaxially sleeved on the connecting rod 821. In this embodiment, the spring 823 is used to push the limiting strip 81 to move away from the feed source 2. The surface of the abutting rod 822 away from the connecting rod 821 is provided with a guide surface 9, which can be inclined or arc-shaped, depending on the requirements. The limiting plate 7 has a first slot 612 on the inner wall of the through groove 611 for the connecting rod 821 to be inserted. The first slot 612 is connected to the through groove 611, and the abutting rod 822 extends into the through groove 611.

[0047] When the second bolt is tightened, its end presses against the guide surface 9, thereby pushing the abutment rod 822 and the connecting rod 821. When the second bolt is disengaged from the second threaded hole 43, that is, from the mounting base 4, the spring 823 can drive the limit bar 81 to reset, so as to pull away the clamping force on the feed source 2.

[0048] Example 3: Reference Figure 9 The difference from Embodiment 2 is that in this embodiment, the second bolt includes, from top to bottom, a first threaded segment 621 that is threadedly connected to the limiting ring 61, a connecting segment 622, and a second threaded segment 623 that is threadedly connected to the mounting base 4. The diameter of the connecting segment 622 is smaller than the diameter of the first threaded segment 621 / the second threaded segment 623. The connecting segment 622 is smoothly transitioned into an arc shape near the edges of the first threaded segment 621 and the second threaded segment 623 so as to abut against the guide surface 9.

[0049] The second bolt is designed with a specific structure, where the diameter of its connecting section 622 is smaller than that of the first threaded section 621 and the second threaded section 623, and its edge is smoothly transitioned into an arc. When it abuts against the abutting rod 822, it can initially position the feed source 2 so that the feed source 2 can be adjusted before the second bolt is tightened. When it is fully tightened, the first threaded section 621 abuts against the abutting rod 822, thereby pressing against the feed source 2 to ensure that the feed source 2 is stably fixed after being adjusted to the target height, reducing loosening caused by vibration or environmental changes, and further improving the stability and reliability of the feed source 2 height adjustment device.

[0050] Example 4: Reference Figure 10 The difference from Embodiment 2 is that in this embodiment, the flexible member 10 can be a rubber strip or an airbag, and the outer peripheral wall / limiting strip 81 of the feed source 2 is provided with a limiting part 22 that abuts against the flexible member 10. In this embodiment, the flexible member 10 is disposed on the limiting strip 81, and specifically is an airbag, while the limiting part 22 is disposed on the outer peripheral wall of the feed source 2.

[0051] Furthermore, to improve the clamping effect, in this embodiment, the limiting plate 7 is provided with an air supply pipe 101 connected to the airbag, and the limiting plate 7 is provided with an air storage chamber 73 connected to the air supply pipe 101. A piston plate 74 is slidably connected in the air storage chamber 73, and a push rod 75 is connected to the piston plate 74. The limiting plate 7 has a second slot 613 connected to the through groove 611. The push rod 75 is slidably inserted into the second slot 613. A guide surface 9 is provided at the end of the push rod 75 near the second bolt. The push rod 75 is located below the pusher 82. It should be noted that the above structure can also be provided in the limiting ring 61, depending on the specific requirements.

[0052] Specifically, the limiting part 22 consists of limiting protrusions, which are spaced apart around the axis of the feed source 2 and also spaced apart along the height direction of the feed source 2. In this embodiment, the radial cross-section of the feed source 2 can be circular, and the rotation along the axis of the feed source 2 can be restricted by the limiting mechanism 6 described above. Axial locking can be achieved by the friction between the airbag and the limiting protrusions to improve adaptability.

[0053] This embodiment can be combined with embodiment 3, thereby achieving the following: Figure 11 As shown, the feed source 2 can be initially positioned. After the feed source 2 is adjusted and fully tightened, the first threaded section 621 abuts against the push rod 75, thereby expanding the air bladder to press against the feed source 2, ensuring that the feed source 2 is stably fixed after being adjusted to the target height, reducing loosening caused by vibration or environmental changes, and further improving the stability and reliability of the feed source 2 height adjustment device.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-precision feed height adjustment device based on screw rotation adjustment, characterized in that: The device includes a parabolic antenna (1), a feed (2) located in the middle of the parabolic antenna (1), and a mounting mechanism (3) for mounting the feed (2) onto the parabolic antenna (1). The mounting mechanism (3) includes a mounting base (4) and a support assembly (5) connected to the mounting base (4) and the parabolic antenna (1). The lower surface of the feed (2) has a protruding mounting screw (21). The upper surface of the mounting base (4) has a first threaded hole (42) for threaded connection of the mounting screw (21). The length of the first threaded hole (42) is greater than or equal to the length of the mounting screw (21). The mounting base (4) is provided with a limiting mechanism (6) for limiting the rotation of the feed (2).

2. The high-precision feed height adjustment device based on thread rotation adjustment according to claim 1, characterized in that: The thread pitch on the mounting screw (21) is 0.5mm-1mm.

3. The high-precision feed height adjustment device based on thread rotation adjustment according to claim 1, characterized in that: The limiting mechanism (6) includes a limiting ring (61) and a fixing component (62) for fixing the limiting ring (61) on the mounting base (4). The limiting ring (61) has a through groove (611) for the feed source (2) to pass through.

4. The high-precision feed height adjustment device based on thread rotation adjustment according to claim 3, characterized in that: The limiting ring (61) includes two symmetrically arranged limiting plates (7), and a through groove (611) is formed between the two limiting plates (7) for the feed source (2) to pass through. The limiting plate (7) abuts against the feed source (2), and the cross-section of the feed source (2) in the radial direction is a regular polygon.

5. A high-precision feed height adjustment device based on thread rotation adjustment according to claim 4, characterized in that: The opposing surfaces of the two limiting plates (7) are respectively provided with mutually cooperating protrusions (71) and grooves (72).

6. A high-precision feed height adjustment device based on thread rotation adjustment according to claim 3, characterized in that: The limiting mechanism (6) further includes a clamping component (8) for abutting against the feed source (2). Several clamping components (8) are arranged at intervals around the axis of the feed source (2). The clamping component (8) includes a limiting strip (81) abutting against the side wall of the feed source (2), a connecting rod (821) connected to the limiting strip (81), and a pusher (82) that interacts with the fixing component (62) to convert the axial force into a radial pushing force.

7. A high-precision feed height adjustment device based on thread rotation adjustment according to claim 6, characterized in that: The pushing member (82) includes an abutting rod (822) that abuts against the connecting rod (821) and a spring (823) coaxially sleeved on the connecting rod (821). The surface of the abutting rod (822) away from the connecting rod (821) is provided with a guide surface (9). The fixing assembly (62) includes a second bolt threaded through the limiting ring (61). The limiting ring (61) has a first insert for the connecting rod (821) to be inserted into the inner wall of the through groove (611). The upper surface of the limiting ring (61) is provided with a through groove (611) for the second bolt to pass through. The first slot (612) is connected to the through groove (611). The abutment rod (822) extends to the through groove (611). When the second bolt is tightened, its end presses against the guide surface (9) to push the abutment rod (822) and the connecting rod (821). The spring (823) is used to push the limiting strip (81) to move away from the feed source (2).

8. A high-precision feed height adjustment device based on thread rotation adjustment according to claim 7, characterized in that: The second bolt, from top to bottom, includes a first threaded section (621) that is threaded to the limiting ring (61), a connecting section (622), and a connecting section (622) that is threaded to the mounting base (4). The diameter of the connecting section (622) is smaller than the diameter of the first threaded section (621) / the second threaded section (623). The connecting section (622) is smoothly transitioned into an arc shape near the edge of the first threaded section (621) and the second threaded section (623) so as to abut against the guide surface (9).

9. A high-precision feed height adjustment device based on threaded rotation adjustment according to claim 6, characterized in that: A flexible element (10) is provided on the outer peripheral wall of the limiting strip (81) / feed source (2), and a limiting part (22) that abuts against the flexible element (10) is provided on the outer peripheral wall / limiting strip (81) of the feed source (2).

10. A high-precision feed height adjustment device based on threaded rotation adjustment according to claim 9, characterized in that: The flexible component (10) is an airbag. The limiting ring (61) is provided with an air supply pipe (101) connected to the airbag. The limiting ring (61) is provided with an air storage chamber (73) connected to the air supply pipe (101). A piston plate (74) is slidably connected in the air storage chamber (73). A push rod (75) is connected on the piston plate (74). The limiting ring (61) has a second slot (613) connected to the through groove (611). The push rod (75) is slidably inserted into the second slot (613). A guide surface (9) is provided at one end of the push rod (75) that is close to the second bolt. The push rod (75) is located below the pusher (82).

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