Tuning method and device for a tuning rod

Abstract

This invention relates to a tuning method for a tuning rod, comprising the following steps: S1, preparing a hollow tuning rod with a smooth inner wall; S2, sliding the tuning rod through a hole in a tuning cover plate; S3, adjusting the position of the tuning rod during the sliding process to achieve the required tuning amount; S4, then inserting a top-expanding structure into the tuning rod, causing the rod wall of the tuning rod located in the hole to expand outward to tightly fit the hole. A tuning device for the tuning rod is also provided. This invention, through the top-expanding structure, allows the rod wall of the tuning rod to expand outward to secure it to the tuning cover plate. On the one hand, it eliminates the need for a screw, achieving a threadless fit and preventing the production of debris, which is beneficial for inter-tuning. On the other hand, the thickness of the tuning cover plate can be significantly reduced, resulting in product weight reduction. The pre-tightening component provides a limiting force during tuning, making the tuning more precise and ensuring that the tuning amount of the tuning rod meets the product's specifications.

Description

Technical Field

[0001] This invention relates to the field of tuning technology, specifically to a tuning method and apparatus for a tuning lever. Background Technology

[0002] In existing technologies, the tuning rod achieves its positioning function using a double-nut principle. Its main problems in filter applications are as follows:

[0003] 1. The threads themselves have sharp corners, which can easily cause arcing in structures with high power and close spacing. The sharp corners also have a certain impact on intermodulation.

[0004] 2. During the tightening process of threaded connections, debris is prone to occur. It is known from experiments that debris is an important factor in the deterioration of product interoperability.

[0005] 3. Due to the influence of the pitch length, threaded connections require a larger thickness for the tuning cover and nut to ensure connection reliability, hence the heavier weight. Summary of the Invention

[0006] The purpose of this invention is to provide a tuning method and apparatus for a tuning rod, which can at least solve some of the defects in the prior art.

[0007] To achieve the above objectives, embodiments of the present invention provide the following technical solution: a tuning method for a tuning lever, comprising the following steps:

[0008] S1, Prepare a hollow tuning rod with a smooth inner wall.

[0009] S2, causing the tuning rod to slide through the hole in the tuning cover plate.

[0010] S3, During the sliding process, adjust the position of the tuning lever to achieve the required tuning amount.

[0011] S4, then the top expansion structure is inserted into the tuning rod, and the rod wall of the tuning rod located in the hole expands outward to fit tightly against the hole.

[0012] Furthermore, the method of expanding the wall of the tuning rod using the aforementioned top expansion structure is specifically as follows:

[0013] First, an expansion sleeve is inserted into the tuning rod, with the inner diameter of the expansion sleeve being smallest at the hole.

[0014] Then insert the push rod into the expansion sleeve.

[0015] When the push rod enters the part with the smallest inner diameter in the expansion sleeve, the push rod pushes the expansion sleeve outward, and the expansion sleeve then expands the rod wall of the tuning rod, and makes the rod wall fit tightly against the hole of the tuning cover plate.

[0016] Furthermore, inside the expansion sleeve, along the insertion direction of the push rod, the inner diameter of the expansion sleeve gradually decreases, and reaches its minimum at the hole.

[0017] Furthermore, the outer wall of the expansion sleeve has protruding ridges, and there are at least two protruding ridges. The two protruding ridges are spaced apart along the length direction of the expansion sleeve, and the distance between the two protruding ridges is the depth of the hole. When the expansion sleeve expands the rod wall, at least two protrusions are formed on the rod wall, and the two protrusions respectively clamp the upper and lower end faces of the hole.

[0018] Furthermore, after the expansion sleeve gradually shrinks to its minimum size, it continues to extend for a period of equal spacing.

[0019] Furthermore, during the adjustment of the tuning rod, a pre-tightening assembly is used to apply a certain clamping force to the tuning rod to limit its sliding.

[0020] Furthermore, the method of using the pre-tightening component to restrict the sliding of the tuning rod is specifically as follows:

[0021] A pre-tightening cover plate with through holes is installed on the tuning cover plate.

[0022] A preload sleeve is installed in the through hole of the preload cover plate, the tuning rod passes through the preload sleeve, and the preload sleeve restricts the sliding of the tuning rod by its internal limiting structure.

[0023] Furthermore, the limiting structure specifically uses elastic force to compress the tuning rod to achieve the purpose of limiting it.

[0024] Furthermore, after the tuning rod wall expands outward to fit tightly against the hole, the top expansion structure is removed; when the pre-tightening assembly is introduced, the pre-tightening assembly is also removed after the rod wall fits tightly against the hole.

[0025] This invention provides another technical solution: a tuning device for a tuning rod, comprising a hollow tuning rod with a smooth inner wall, a tuning cover plate through which the tuning rod passes, and a top expansion structure that can extend into the tuning rod. After the top expansion structure extends into the inner cavity of the tuning rod, it continues to extend forward, causing the rod wall of the tuning rod located in the hole of the tuning cover plate to expand outward to fit tightly against the hole.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. The top expansion structure allows the tuning rod wall to expand outward to secure it to the tuning cover plate. On the one hand, it eliminates the need for screws, achieving a threadless fit and preventing the production of debris, which is beneficial for inter-tuning. On the other hand, the thickness of the tuning cover plate is also reduced, resulting in a significant reduction in product weight.

[0028] 2. The pre-tightening component provides a limiting force during tuning, making tuning more precise and ensuring that the tuning amount of the tuning rod meets the product's specifications.

[0029] 3. The final tuner structure consists of only a hollow tuner rod with a smooth inner wall. The top expansion structure and pre-tightening components are completely removed, along with a thinner tuner cover plate. It uses less material, has a compact structure, low cost, and light weight. Attached Figure Description

[0030] Figure 1 A schematic diagram showing the cavity of the cavity filter after a tuning cover has been installed.

[0031] Figure 2 A schematic diagram showing the cavity after the pre-tightening assembly has been installed.

[0032] Figure 3 A schematic diagram showing the tuning lever after the preload assembly has been installed.

[0033] Figure 4 This is a schematic diagram after the top expansion structure has been installed;

[0034] Figure 5 A schematic diagram showing the insertion of the top rod of the top expansion structure to cause the wall of the tuning rod to expand outward and fit tightly against the hole;

[0035] Figure 6 This is a schematic diagram of the top rod of the expansion structure after it has been retracted.

[0036] Figure 7 This is a schematic diagram after the top expansion structure has been removed;

[0037] Figure 8 This is a schematic diagram after the pre-tightening components have been removed;

[0038] Figure 9 This is a top view of the cavity of the cavity filter;

[0039] Figure 10 This is a schematic diagram of the expansion sleeve and the push rod.

[0040] Figure 11 for Figure 10 An enlarged schematic diagram of the area circled in dashed shape;

[0041] In the attached diagram, the following labels are used: 1-tuning rod; 10-rod wall; 11-protrusion; 2-tuning cover plate; 20-hole; 3-top expansion structure; 30-expansion sleeve; 31-top rod; 32-first section; 33-recessed section; 34-extension section; 35-protruding ridge; 4-pre-tightening assembly; 40-pre-tightening cover plate; 41-pre-tightening sleeve; 42-through hole; 5-cavity. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figures 1 to 8 It refers to the entire tuning process, from the initial installation of the preload and top expansion components to the final removal of the preload and top expansion components after tuning is completed. Figures 1 to 8 It is arranged according to the order of actions, and Figures 1 to 8 , Figure 10 All are sectional views. Figure 1 This is a schematic diagram showing the cavity 5 after the tuning cover 2 has been installed. Figure 9 A sectional view along the AA direction. See specifically... Figures 1 to 9 This invention provides a tuning method for a tuning rod, comprising the following steps: S1, preparing a hollow tuning rod with a smooth inner wall; S2, sliding the tuning rod through a hole in a tuning cover plate; S3, adjusting the position of the tuning rod during the sliding process to achieve the required tuning amount; S4, then inserting a top-expanding structure into the tuning rod, causing the rod wall of the tuning rod located in the hole to expand outwards to fit tightly against the hole. In this embodiment, the top-expanding structure allows the rod wall of the tuning rod to expand outwards to secure it to the tuning cover plate. On the one hand, it eliminates the need for a screw, achieving a threadless fit and preventing the production of debris, which is beneficial for inter-tuning. On the other hand, the thickness of the tuning cover plate is also reduced, resulting in a significant reduction in product weight. Specifically, with this tuning method, the traditional screw assembly method (double nuts, or double nuts with washers for locking) is no longer required; a hollow, smooth-walled rod can be used directly, thus solving a series of problems caused by threads. After the tuning rod is adjusted to the appropriate tuning amount by sliding up and down (this tuning amount is a standard amount and is adjusted according to actual needs, so it is not limited), the rod wall of the tuning rod is expanded outward by the top expansion structure so that the rod wall is tightly attached to the hole, thereby completing the fastening installation of the tuning rod and the tuning cover plate.

[0044] As an optimized solution for an embodiment of the present invention, please refer to Figure 4 , Figure 5 and Figure 6 , Figure 4 This indicates that the push rod has not yet entered the position of the hole. Figure 5 It refers to the position where the push rod is inserted into the hole. Figure 6This is the state after the push rod is retracted. The specific method of expanding the tuning rod wall using the aforementioned expansion structure is as follows: First, an expansion sleeve is inserted into the tuning rod, with the inner diameter of the expansion sleeve being smallest at the hole. Then, a push rod is inserted into the expansion sleeve. When the push rod enters the part of the expansion sleeve with the smallest inner diameter, the push rod pushes the expansion sleeve outward, and the expansion sleeve then expands the tuning rod wall, making the rod wall tightly fit against the hole in the tuning cover plate. In this embodiment, the expansion structure can include two parts: an expansion sleeve and a push rod. The expansion sleeve has a certain thickness to achieve a different inner diameter but a consistent outer diameter. A consistent outer diameter ensures it fits snugly against the inner wall of the tuning rod. At the hole, the inner diameter of the expansion sleeve decreases, allowing the push rod to compress the expansion sleeve when inserted there, thus expanding the tuning rod wall and causing deformation of the rod wall (e.g., Figure 5 As shown in the diagram, this achieves the purpose of outward expansion of the rod wall, allowing it to be tightly pressed against the tuning cover plate. In fact, as long as the rod wall can be expanded, any structural form of the top expansion structure is feasible. For example, in another embodiment, a rod with an expandable end can be used. Whether the expansion is achieved by air inflation or mechanical control, these are all feasible solutions. The rod wall of the tuning rod can be opened by the self-controllable expansion end, allowing it to be tightly fitted against the tuning cover plate. Since it is self-controlled, it does not move when entering the tuning rod. It expands only after the end reaches the position of the hole, facilitating the entry of the rod.

[0045] For further optimization of the above solution, please refer to [link / reference]. Figure 4 , Figure 5 and Figure 6 Inside the expansion sleeve, along the insertion direction of the push rod (i.e., the direction in which the push rod slides downwards), the inner diameter of the expansion sleeve gradually decreases, reaching its minimum at the hole. Preferably, after the expansion sleeve reaches its minimum, it continues to extend into a section with equal spacing. In this embodiment, the interior of the expansion sleeve can be considered as three sections: the first section is a relatively thick section, just enough for the push rod to slide smoothly within it; the second section is a tapering section, with the inner diameter gradually decreasing until it reaches its minimum; and the third section is another extension section with a uniform inner diameter. All of these sections are in their minimum inner diameter state, ensuring that the tuning rod wall at the hole can be stretched open and tightly adhered to the tuning cover plate. The tapering section can serve as a guide section, facilitating the push rod's smooth entry into the extension section.

[0046] As an optimized solution of the embodiment of the present invention Figure 8 , Figure 10 and Figure 11The outer wall of the expansion sleeve has protruding ridges, with at least two ridges spaced apart along the length of the expansion sleeve. The distance between the two ridges is the depth of the hole. When the expansion sleeve expands the rod wall, at least two protrusions are formed on the rod wall, and the two protrusions respectively clamp the upper and lower end faces of the hole. In this embodiment, to make the rod wall of the tuning rod more securely connected to the tuning cover plate, protrusions can be designed to clamp the tuning cover plate. Specifically, protruding ridges can be provided on the outer wall of the expansion sleeve. The ridges can be a circle, or one or more, but it is important to note that there should be two ridges spaced apart to form an upper and lower protrusion. In this embodiment, a circular ridge is preferred, that is, a circle of upper ridges and a circle of lower ridges. Figure 11 As shown, when the expansion sleeve is pressed by the push rod, its outer wall deforms, pressing the wall of the tuning rod, causing the rod wall to form two concentric protrusions according to the mold of the convex ridge. These two protrusions can fit precisely into the upper and lower end faces of the hole, as shown. Figure 8 As shown.

[0047] As an optimized solution for an embodiment of the present invention, please refer to Figure 4 , Figure 5 and Figure 6 The tapered section of the expansion sleeve is located near the hole. In this embodiment, the tapered section is located near the hole, eliminating the need for the entire expansion sleeve to tape, thus reducing manufacturing difficulty. Of course, a fully tapered structure is also feasible.

[0048] As an optimized solution for an embodiment of the present invention, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8 During tuning, a pre-tightening assembly is used to apply a certain clamping force to the tuning rod to limit its sliding. In this embodiment, a pre-tightening assembly is used to provide a certain clamping force to the tuning rod to create resistance during tuning. Without this pre-tightening assembly, the adjustment would be too quick due to the smooth outer wall of the tuning rod and the inner wall of the hole, hindering precise tuning. Therefore, this embodiment includes the pre-tightening assembly, which provides a clamping force without completely locking the tuning rod, making it easier for operators to control the tuning amount. This pre-tightening assembly is used before jacking, to ensure that the tuning rod is adjusted to the required tuning amount before jacking. The pre-tightening assembly can be present or absent, but its presence is more effective.

[0049] For further optimization of the above solution, please refer to [link / reference]. Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8The method of using the pre-tightening assembly to limit the sliding of the tuning rod is as follows: a pre-tightening cover plate is installed on the tuning cover plate. The pre-tightening cover plate has a through hole, and a pre-tightening sleeve is installed in the through hole of the pre-tightening cover plate. The tuning rod passes through the pre-tightening sleeve, and the pre-tightening sleeve limits the sliding of the tuning rod through its internal limiting structure. In this embodiment, the pre-tightening assembly includes a pre-tightening cover plate and a pre-tightening sleeve. The pre-tightening cover plate covers the tuning cover plate and has a large through hole, the diameter of which is larger than the hole in the tuning cover plate, to facilitate the installation of the pre-tightening sleeve inside. The pre-tightening sleeve is fitted onto the tuning rod, and a certain limiting force is provided through the limiting structure in contact with the tuning rod, thereby limiting the sliding of the tuning rod. The pre-tightening sleeve can be a one-piece molded collar or an openable two-part structure, as long as it can fit over the tuning rod.

[0050] To further optimize the above solution, the limiting structure specifically uses elastic force to compress the tuning rod, thereby achieving the purpose of limiting it. In this embodiment, the limiting method can use elastic force, such as a spring sheet, to compress the tuning rod. Of course, in addition to this, it is also feasible to make good use of friction, such as rubber, uneven structures, etc., to increase friction. This embodiment does not limit this method.

[0051] As an optimized solution for an embodiment of the present invention, please refer to Figure 7 and Figure 8 After the tuning rod wall expands outward to fit tightly against the hole, the top expansion structure is removed; when the preload assembly is introduced, it is also removed after the rod wall fits tightly against the hole. In this embodiment, after tuning is completed and the tuning rod wall expands outward to fit tightly against the hole, both the top expansion structure and the preload assembly can be removed, resulting in the final state as shown. Figure 8 The configuration shown is significantly simpler than traditional cavities and tuning rods, yet achieves better results. The removed top expansion structure and pre-tightening assembly can be reused in other cavity filters, allowing for repeated use. This can be achieved simply by using a highly malleable material when fabricating the expansion sleeve.

[0052] Please see Figures 1 to 9This invention provides a tuning device for a tuning rod, including a hollow tuning rod with a smooth inner wall, a tuning cover plate through which the tuning rod passes, and a top-expanding structure that extends into the tuning rod. After extending into the inner cavity of the tuning rod, the top-expanding structure continues to extend forward, causing the wall of the tuning rod located in the hole to expand outward and tightly fit against the hole. In this embodiment, the top-expanding structure allows the wall of the tuning rod to expand outward and securely fasten with the tuning cover plate. This eliminates the need for a screw, achieving a threadless fit and preventing debris production, which is beneficial for inter-tuning. Furthermore, the thickness of the tuning cover plate can be significantly reduced, resulting in product weight reduction. Specifically, using this tuning method eliminates the need for traditional screw assembly methods (double nuts, or double nuts with washers for locking); a hollow, smooth-walled rod can be used directly, thus solving a series of problems caused by threads. After the tuning rod is adjusted to the appropriate tuning amount by sliding up and down (this tuning amount is a standard amount and is adjusted according to actual needs, so it is not limited), the rod wall of the tuning rod is expanded outward by the top expansion structure so that the rod wall is tightly attached to the hole, thereby completing the fastening installation of the tuning rod and the tuning cover plate.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tuning method for a tuning lever, characterized in that, Includes the following steps: S1, Prepare a hollow tuning rod with smooth inner and outer walls. S2, causing the tuning rod to slide through the hole in the tuning cover plate. S3, During the sliding process, adjust the position of the tuning lever to achieve the required tuning amount. S4, then a top-expanding structure is inserted into the tuning rod, and the rod wall of the tuning rod located in the hole expands outward to fit tightly against the hole. During tuning, a preload assembly is used to apply a certain clamping force to the tuning rod to limit its slippage. The method of using the pre-tightening component to limit the sliding of the tuning rod is specifically as follows: A pre-tightening cover plate with through holes is installed on the tuning cover plate. A preload sleeve is installed in the through hole of the preload cover plate, and the tuning rod passes through the preload sleeve. The preload sleeve restricts the sliding of the tuning rod through its internal limiting structure. The pre-tightening assembly is performed before the top expansion. After adjusting to the required tuning amount with the tuning lever, the tuning lever is then expanded.

2. The tuning method of the tuning lever as described in claim 1, characterized in that, The specific method of expanding the wall of the tuning rod using the top expansion structure is as follows: First, an expansion sleeve is inserted into the tuning rod, with the inner diameter of the expansion sleeve being smallest at the hole. Then insert the push rod into the expansion sleeve. When the push rod enters the part with the smallest inner diameter in the expansion sleeve, the push rod pushes the expansion sleeve outward, and the expansion sleeve then expands the rod wall of the tuning rod, and makes the rod wall fit tightly against the hole of the tuning cover plate.

3. The tuning method for the tuning lever as described in claim 2, characterized in that: Inside the expansion sleeve, along the insertion direction of the push rod, the inner diameter of the expansion sleeve gradually decreases, and reaches its minimum at the hole.

4. The tuning method of the tuning lever as described in claim 3, characterized in that: The outer wall of the expansion sleeve has protruding ridges, and there are at least two protruding ridges. The two protruding ridges are spaced apart along the length direction of the expansion sleeve, and the distance between the two protruding ridges is the depth of the hole. When the expansion sleeve expands the rod wall, at least two protrusions are formed on the rod wall, and the two protrusions respectively clamp the upper and lower end faces of the hole.

5. The tuning method of the tuning lever as described in claim 3, characterized in that: The expansion sleeve gradually shrinks to its minimum size and then extends for a period of equal spacing.

6. The tuning method of the tuning lever as described in claim 1, characterized in that: The limiting structure specifically uses elastic force to compress the tuning rod, thereby limiting its movement.

7. The tuning method of the tuning lever as described in claim 1, characterized in that: After the tuning rod wall expands outward to fit tightly against the hole, the expansion structure is removed; when the preload assembly is introduced, the preload assembly is also removed after the rod wall fits tightly against the hole.

8. A tuning device for a tuning lever, characterized in that: Tuning a tuning rod using any one of the tuning methods described in claims 1-7 includes a hollow tuning rod with a smooth inner wall, a tuning cover plate through which the tuning rod passes, and a top-expanding structure that can extend into the tuning rod. After extending into the inner cavity of the tuning rod, the top-expanding structure continues to extend forward, causing the rod wall of the tuning rod located in the hole of the tuning cover plate to expand outward to fit tightly against the hole.

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