Noise reduction mechanism of automobile water pump

The utility model relates to the technical field of automobile water pump noise reduction, in particular to a noise reduction mechanism of an automobile water pump, which comprises a water pump body, an impeller and a mounting hole ring, the inner side of the mounting hole ring is slidably connected with a thread sleeve, the inner side of the thread sleeve is spirally connected with a threaded rod, and the outer side of the thread sleeve is fixedly connected with an arc-shaped clamping block. According to the noise reduction mechanism for the automobile water pump, due to the structure formed by the threaded sleeve, the threaded rod, the arc-shaped clamping blocks and the like, the capacity that the noise reduction mechanism for the automobile water pump can enable a bolt to be not prone to loosening is achieved, the problem that noise is generated due to loosening of the bolt is solved, and the noise reduction mechanism for the automobile water pump has the advantages of being simple in structure, convenient