Structure for welding filter cover plate and debugging screw

Abstract

The utility model discloses a structure for welding a filter cover plate and a debugging screw. The structure comprises a debugging screw rod, a cover plate and a nut, the debugging screw rod penetrates through the cover plate, and the nut is installed on the debugging screw rod and locks the debugging screw rod and the cover plate. Wherein a vertical groove sunken towards the center of the debugging screw rod is formed in the side part of the debugging screw rod, a screw hole is formed in the center of the cover plate, a counter bore is formed in the upper end of the screw hole, the size of the counter bore is larger than that of the screw hole, and the debugging screw rod penetrates through the counter bore and the screw hole. According to the structure for welding the filter cover plate and the debugging screw rod, the structure at the locking position of the cover plate is improved in the filter manufacturing process, the cover plate and the debugging screw rod can be welded through solder paste, the screw rod and the cover plate are welded into a whole, it is guaranteed that the screw rod and the cover plate are not loosened under the influence of external factors, and the service life of the cover plate and the debugging screw rod is prolonged. And the adjustment of the filter can be realized by tightening the nut or knocking after welding in a manner of forming the sinking hole, so that the production debugging requirements are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter field especially relates to a structure for filter cover plate and debugging screw rod welding. BACKGROUND

[0002] With the development of wireless communication, the importance of the intermodulation stability index of the metal cavity filter, which is an important component in the base station system, is increasingly concerned.

[0003] In the current metal cavity filter structure, the screw nut is used to lock the screw rod on the cover plate, but the screw nut may be loose under the influence of transportation vibration or other external forces, so that the screw rod and the cover plate cannot be locked, which affects the electrical performance index of the filter. At the same time, the mechanical contact between the screw rod and the cover plate is easy to produce intermodulation interference in the filter work, which affects the intermodulation index and the intermodulation stability of the product. SUMMARY

[0004] To solve the above problems, the utility model provides a structure for filter cover plate and debugging screw rod welding, which improves the structure of the cover plate locking part in the filter manufacturing process, can use tin paste to weld the cover plate and the debugging screw rod, makes the screw rod and the cover plate into one, ensures that the screw rod and the cover plate do not loosen under the influence of external factors, and realizes the adjustment of the filter by tightening the nut or knocking after welding through the setting of the sinking hole, meets the production debugging requirements.

[0005] According to one aspect of the utility model, a structure for filter cover plate and debugging screw rod welding is provided, which comprises a debugging screw rod, a cover plate and a nut, the debugging screw rod passes through the cover plate, and the nut is installed on the debugging screw rod and locks the debugging screw rod and the cover plate; wherein the vertical groove recessed to the center is formed in the side of the debugging screw rod, the central part of the cover plate is formed with a threaded hole, the upper end of the threaded hole is formed with a sinking hole, the size of the sinking hole is larger than that of the threaded hole, and the debugging screw rod passes through the sinking hole and the threaded hole.

[0006] In some embodiments, the debugging screw rod is made of copper or stainless steel. Its advantage lies in that the suitable material of the debugging screw rod is described.

[0007] In some embodiments, the cover plate is made of aluminum. Its advantage lies in that the suitable material of the debugging cover plate is described.

[0008] In some embodiments, the two symmetrical sides of the debugging screw rod are respectively formed with two vertical grooves. Its advantage lies in that the setting of two vertical grooves can provide the speed and uniformity of tin filling.

[0009] In some embodiments, the adjusting screw has external threads on its exterior, and the nut has internal threads. This is advantageous because the adjusting screw and nut can be secured together by the external and internal threads.

[0010] In some embodiments, the bottom end of the vertical groove extends to the bottom end of the external thread, and the bottom of the adjusting screw is sealed. It is advantageous that the relevant structure of the adjusting screw is further described. Attached Figure Description

[0011] Figure 1 This is a top view of a structure for welding a filter cover and a tuning screw according to one embodiment of the present invention.

[0012] Figure 2 for Figure 1 The diagram shows a cross-sectional view of a structure for welding a filter cover and a tuning screw.

[0013] Figure 3 for Figure 1 A schematic diagram of the top surface structure of the adjustment screw shown;

[0014] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure of the adjustment screw shown;

[0015] Figure 5 for Figure 1 A schematic diagram of the top surface structure of the cover plate shown;

[0016] Figure 6 for Figure 5 The diagram shows a cross-sectional view of the cover plate.

[0017] In the diagram: 1. Adjustment screw; 2. Cover plate; 3. Nut; 4. Vertical groove; 5. Screw hole; 6. Countersunk hole; 7. External thread. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings.

[0019] like Figures 1-2 As shown, the structure includes a vertical adjusting screw and a cover plate, wherein the adjusting screw passes through the cover plate and a nut is installed on the adjusting screw to lock the adjusting screw to the cover plate.

[0020] Preferably, the adjusting screw 1 is made of copper or stainless steel, while the cover plate 2 is made of aluminum.

[0021] like Figures 3-4As shown, the side of the debugging screw 1 is formed with a vertical groove 4 recessed to its center, which is used to pour in the melted tin liquid. The outer thread 7 is formed on the outer part of the debugging screw 1, and the nut 3 has a corresponding inner thread, so the debugging screw 1 is fixed with the nut 3 through the outer thread 7 and the inner thread.

[0022] Preferably, two vertical grooves 4 are formed on the symmetrical two sides of the debugging screw 1 respectively, and the melted tin liquid can be poured into the debugging screw 1 from the two sides through the two vertical grooves 4 simultaneously.

[0023] As shown, Figures 5-6 The cover plate 2 is part of the filter structure, and a screw hole 5 is formed in the center of the cover plate 2, and the debugging screw 1 passes through the screw hole 5. A sunken hole 6 larger than the size of the upper section of the screw hole 5 is formed in the upper section of the screw hole 5, and the debugging screw 1 also passes through the sunken hole 6. Due to the existence of the sunken hole 6, the length of the debugging screw 1 penetrating into the screw hole 5 can be adjusted after welding by tightening the nut 3 or knocking the cover plate 2.

[0024] Preferably, the bottom end of the vertical groove 4 on the debugging screw 1 extends to the bottom end of the outer thread 7, and the bottom of the debugging screw 1 is sealed.

[0025] After the debugging of the filter product is completed, the nut 3 is used to lock and fix the debugging screw 1 and the cover plate 2, then the tin is dotted on the top of the debugging screw 1, and then the filter product is sent into the welding equipment for overall heating. During the heating process, the tin paste is melted to form a tin liquid which flows downward through the vertical grooves 4 and slowly penetrates into the contact teeth of the debugging screw 1 and the cover plate 2, and fills the screw hole 5 and the sunken hole 6. After the welding is completed, the tin liquid solidifies, so that the cover plate 2 and the debugging screw 1 are welded as a whole.

[0026] After the welding is completed, the performance of the filter may have a slight change, and due to the existence of the sunken hole 6, the length of the debugging screw 1 penetrating into the screw hole 5 can be adjusted by using a tightening wrench to adjust the tightening nut 3 or by knocking the cover plate 2, so as to achieve the effect of adjusting the performance of the filter.

[0027] The structure for welding the cover plate and the debugging screw of the filter mainly has the following beneficial effects:

[0028] 1. The welding process is easy to realize;

[0029] 2. The structure after welding is more stable and reliable, and will not be affected by external factors such as vibration;

[0030] 3. For the slight change of the performance of the filter after welding, the filter can be adjusted after welding by tightening the nut or knocking the cover plate.

[0031] The above merely describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept, some modifications and improvements can be made, and these all belong to the protection scope of the present application.

Claims

1. A structure for filter cover plate and tuning screw weld, characterized by: The utility model relates to a debugging screw (1), a cover plate (2) and a nut (3), the debugging screw (1) passes through the cover plate (2), the nut (3) is installed on the debugging screw (1) and locks the debugging screw (1) and the cover plate (2), wherein the debugging screw (1) side forms the vertical groove (4) recessed to the center, the central part of the cover plate (2) is formed with the screw hole (5), the upper end of the screw hole (5) is formed with a sunken hole (6), the size of the sunken hole (6) is greater than the screw hole (5), the debugging screw (1) passes through the sunken hole (6) and the screw hole (5).

2. A structure for filter cover plate and tuning screw welding as claimed in claim 1 wherein: The debugging screw (1) is made of copper or stainless steel.

3. A structure for filter cover plate and tuning screw welding as claimed in claim 1 wherein: The cover plate (2) is made of aluminum.

4. A structure for filter cover plate and trim screw welding as claimed in claim 1, wherein: The symmetric two sides of the debugging screw (1) form two vertical grooves (4) respectively.

5. A structure for filter cover plate and tuning screw welding as claimed in claim 1 wherein: The debugging screw (1) has external threads (7) on the outside, and the nut (3) has internal threads.

6. A structure for filter cover plate and trim screw weld in accordance with claim 5, wherein: The bottom end of the vertical groove (4) extends to the bottom end of the external threads (7), and the bottom of the debugging screw (1) is sealed.

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