Cavity filter and self-locking tuning assembly thereof

Abstract

The invention discloses a self-locking tuning assembly for a cavity filter. The self-locking tuning assembly is used for being arranged on a cover plate of the cavity filter, is tightly connected with the cover plate and comprises a tuning screw rod and a press rivet self-locking nut, wherein the press rivet self-locking nut can be tightly fixed on the cover plate and is provided with a threaded hole, the threaded hole is adaptive to screw teeth of the tuning screw rod, a stamping groove is stamped in the outer side wall of the press rivet self-locking nut, a thread, corresponding to the position of the stamping groove, on the threaded hole in the inner side of the press rivet self-locking nut, radially protrudes to form an opening part by the stamping groove, and the opening part is used for squeezing the screw teeth of the tuning screw rod and increasing a rotation torque. The invention also discloses a cavity filter with the above self-locking tuning assembly. With the implementation of the cavity filter and the self-locking tuning assembly, provided by the invention, the process difficulty can be reduced, the production cost is reduced, secondary operation of the tuning screw rod is eliminated, the adjustment range is expanded, and the debugging efficiency of the filter is improved.

Description

technical field [0001] The invention relates to the field of communication equipment, in particular to a cavity filter and a self-locking tuning component thereof. Background technique [0002] In the prior art, the tuning screw structure used for manual debugging in the cavity filter of communication equipment usually needs to be locked by double nuts. Due to the existence of thread gaps in this structure, it is easy to pull up the screw rod during the locking process, and the adjustment result changes, which affects the adverse consequences of adjustment accuracy. The way to make up for it in the prior art mainly relies on dispensing glue to prevent the nut from loosening after the commissioning is completed, but this way has high labor costs. [0003] In addition, there are currently a small number of self-locking screw structures in the industry, such as cutting grooves on the screw rod and turning two staggered threads. When screwed into ordinary rivet nuts, the two st...

AI Technical Summary

Problems solved by technology

Due to the existence of the thread gap in this structure, it is easy to pull up the screw during the locking process, and the adjustment result changes, which affects the adjustment accuracy.

The way to make up for it in the prior art mainly relies on dispensing and anti-loosening of the nut after the commissioning is completed, but this method has high labor costs

[0003] In addition, there are currently a small number of self-locking screw structures in the industry, such as cutting grooves on the screw rod and turning two staggered threads. When screwed into ordinary rivet nuts, the two staggered threads are pulled apart, and the grooved position produces a shaft. Tensile force, thereby increasing the friction between the screw teeth, to achieve the purpose of self-locking; the problem of this self-locking structure is: due to the high precision requirements of the thread and rotary grooving, the high processing cost, and the difference in individual precision is easy to cause locking. The force is unstable and the risk of failure is high; in addition, because the two sections of thread cannot be rotated out of the nut thread, the tuning range is limited, and screws of different lengths need to be replaced frequently, resulting in low debugging efficiency

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