CN-115732874-B - Tuning method and device for tuning rod

CN115732874BCN 115732874 BCN115732874 BCN 115732874BCN-115732874-B

Abstract

The invention relates to a tuning method of a tuning rod, which comprises the following steps of S1, preparing a hollow tuning rod with a smooth inner wall, S2, enabling the tuning rod to slide through a hole of a tuning cover plate, S3, adjusting the position of the tuning rod in the sliding process so as to achieve the tuning quantity meeting the requirement, S4, then extending into the tuning rod by adopting a top expansion structure, and expanding the rod wall of the tuning rod positioned in the hole outwards so as to be clung to the hole. A tuning device for tuning the tuning rod is also provided. According to the invention, the rod wall of the tuning rod can be expanded outwards through the top expansion structure to be fastened with the tuning cover plate, on one hand, screw rods are not needed, no threaded fit is realized, scraps are not produced, a certain benefit is brought to intermodulation, on the other hand, the thickness of the tuning cover plate is not needed to be very thick, the thickness of the cover plate can be greatly reduced, the weight reduction of a product is realized, and the pre-tightening assembly is used for providing a limiting force during tuning, so that the tuning is more accurate, and the tuning amount of the tuning rod is convenient to meet the index requirement of the product.

Inventors

GAO HEBIAO
ZHONG DAOQIONG

Assignees

武汉凡谷电子技术股份有限公司

Dates

Publication Date: 20260505
Application Date: 20220919

Claims (8)

1. A tuning method of a tuning rod, comprising the steps of: s1, preparing a hollow tuning rod with smooth inner wall and outer wall, S2, enabling the tuning rod to slide through the hole of the tuning cover plate, S3, adjusting the position of the tuning rod in the sliding process to achieve the tuning quantity meeting the requirement, S4, then extending into the tuning rod by adopting a top expansion structure, expanding the rod wall of the tuning rod positioned in the hole outwards to be clung to the hole, When the tuning rod is adjusted, a pre-tightening component is adopted to apply a certain pressing force to the tuning rod so as to limit the sliding of the tuning rod, The mode of limiting the sliding of the tuning rod by adopting the pre-tightening assembly is specifically as follows: a pre-tightening cover plate is arranged on the tuning cover plate, the pre-tightening cover plate is provided with a through hole, A pretension sleeve is arranged in the through hole of the pretension cover plate, the tuning rod passes through the pretension sleeve, the pretension sleeve limits the sliding of the tuning rod through a limiting structure in the pretension sleeve, The pre-tightening assembly is matched with the tuning rod to adjust the required tuning amount before the top expansion, and then the tuning rod is pushed and expanded.
2. The tuning rod tuning method as claimed in claim 1, wherein the expanding of the tuning rod wall by the top expanding structure is specifically: Firstly, an expansion sleeve is arranged in the tuning rod, the inner diameter of the expansion sleeve at the hole is minimum, Then an ejector rod is inserted into the expansion sleeve, When the ejector rod enters the part with the smallest inner diameter in the expansion sleeve, the ejector rod outwards extrudes the expansion sleeve, the expansion sleeve further expands the rod wall of the tuning rod, and the rod wall is tightly attached to the hole of the tuning cover plate.
3. The tuning method of tuning rod of claim 2, wherein inside said expansion shell, along an insertion direction of said ejector pin, an inner diameter of said expansion shell is tapered and minimized at said hole.
4. The tuning method of tuning rod of claim 3, wherein the outer wall of the expansion sleeve is provided with at least two convex edges, the two convex edges are arranged at intervals along the length direction of the expansion sleeve, the distance between the two convex edges is the depth of the hole, when the expansion sleeve is used for expanding the rod wall, at least two bulges are formed on the rod wall, and the two bulges respectively clamp the upper end face and the lower end face of the hole.
5. The method of tuning a tuning rod of claim 3, wherein the expansion sleeve is tapered to a minimum and then continues to extend for an equally spaced extension.
6. The tuning method of tuning rod of claim 1, wherein the limiting structure is used for limiting the tuning rod by pressing the tuning rod with elastic force.
7. The tuning method of the tuning rod of claim 1, wherein the top expansion structure is removed after a rod wall of the tuning rod expands outwardly to abut the hole, and wherein the pretensioning assembly is removed after the rod wall abuts the hole when the pretensioning assembly is introduced.
8.A tuning device of a tuning rod is characterized in that the tuning rod is tuned by adopting the tuning method according to any one of claims 1-7, and comprises a hollow tuning rod with a smooth inner wall, a tuning cover plate for the tuning rod to pass through and a top expansion structure capable of extending into the tuning rod, wherein the top expansion structure continuously extends forwards into an inner cavity of the tuning rod after extending into the inner cavity of the tuning rod, so that the rod wall of the tuning rod in a hole of the tuning cover plate expands outwards to cling to the hole.

Description

Tuning method and device for tuning rod Technical Field The invention relates to the technical field of tuning, in particular to a tuning method and a device for a tuning rod. Background In the prior art, a tuning rod realizes a screw positioning function by a double-nut principle, and the main problems in the application of a filter are as follows: 1. the threads have sharp corners, so that the structure with higher power and closer distance is easy to generate the sparking phenomenon, and the sharp corners have certain influence on intermodulation. 2. The chips are easy to generate in the process of connecting and fastening the threaded pair, and known experiments verify that the chips are an important factor of intermodulation deterioration of products. 3. The screw pair connection is heavy because of the influence of the screw pitch length, which necessarily requires the tuning cover plate and the nut to have larger thickness to ensure the connection reliability. Disclosure of Invention The invention aims to provide a tuning method and a device for a tuning rod, which can at least solve part of defects in the prior art. In order to achieve the above purpose, the embodiment of the invention provides a tuning method of a tuning rod, which comprises the following steps: S1, preparing a hollow tuning rod with a smooth inner wall, S2, enabling the tuning rod to slide through the hole of the tuning cover plate, S3, adjusting the position of the tuning rod in the sliding process to achieve the tuning quantity meeting the requirement, And S4, extending into the tuning rod by adopting a top expansion structure, and expanding the rod wall of the tuning rod positioned in the hole outwards to be tightly attached to the hole. Further, the mode of expanding the wall of the tuning rod by adopting the top expanding structure is specifically as follows: Firstly, an expansion sleeve is arranged in the tuning rod, the inner diameter of the expansion sleeve at the hole is minimum, Then an ejector rod is inserted into the expansion sleeve, When the ejector rod enters the part with the smallest inner diameter in the expansion sleeve, the ejector rod outwards extrudes the expansion sleeve, the expansion sleeve further expands the rod wall of the tuning rod, and the rod wall is tightly attached to the hole of the tuning cover plate. Further, inside the expansion sleeve, along the insertion direction of the ejector rod, the inner diameter of the expansion sleeve is gradually reduced, and the inner diameter of the expansion sleeve is reduced to be minimum at the hole. Further, the outer wall of the expansion sleeve is provided with at least two ribs, the two ribs are arranged at intervals along the length direction of the expansion sleeve, the distance between the two ribs is the depth of the hole, when the expansion sleeve is used for expanding the rod wall, at least two protrusions are formed on the rod wall, and the two protrusions clamp the upper end face and the lower end face of the hole respectively. Further, after the inner part of the expansion sleeve is gradually reduced to the minimum, the expansion sleeve continues to extend for a section of equidistant extension section. Further, a pretensioning assembly is employed to apply a compressive force to the tuning rod as the tuning rod is adjusted to limit sliding of the tuning rod. Further, the manner of restricting the sliding of the tuning rod by the pre-tightening assembly is specifically as follows: a pre-tightening cover plate is arranged on the tuning cover plate, the pre-tightening cover plate is provided with a through hole, And a pre-tightening sleeve is arranged 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 a limiting structure in the pre-tightening sleeve. Furthermore, the limiting mode of the limiting structure is to adopt elastic force to extrude the tuning rod, so that the purpose of limiting the tuning rod is achieved. Further, the top expansion structure is removed after the stem wall of the tuning stem expands outwardly to abut the aperture, and the pretensioning assembly is removed after the stem wall abuts the aperture when the pretensioning assembly is introduced. The embodiment of the invention provides another technical scheme that the tuning device of the tuning rod comprises a hollow tuning rod with a smooth inner wall, a tuning cover plate for the tuning rod to pass through and a top expansion structure which can extend into the tuning rod, wherein the top expansion structure continuously extends forwards into a cavity of the tuning rod after extending into the cavity of the tuning rod, so that the rod wall of the tuning rod positioned in a hole of the tuning cover plate expands outwards to cling to the hole. Compared with the prior art, the invention has the beneficial effects that: 1. The wall of the tunin