The utility model discloses an exhaust
noise elimination exhaust mechanism for a pneumatic pump, which comprises a pump body, an air inlet, an exhaust port and a silencer, a buffer mechanism and a
noise elimination mechanism are arranged in the silencer, the air inlet is arranged in the middle of the pump body obliquely upwards, the exhaust port is arranged in the middle of the pump body obliquely downwards, and the exhaust port is connected with the silencer through a threaded sleeve. A buffering mechanism composed of a
rubber ring, an arc-shaped plate, a spring and a guide rod is arranged on the outer side of the threaded sleeve, gas
impact kinetic energy can be absorbed, vibration at the connecting position is reduced, the silencing mechanism comprises a silencing bin, a vacuum box, a reactive silencing mechanism and silencing cotton, the vacuum box blocks high-
frequency noise, micro-perforated plates staggered in the reactive silencing mechanism achieve
broadband noise reduction, and the silencing effect is good. The silencing cotton adsorbs
residual noise, the cover plate is fixed to the front end of the silencer through bolts, maintenance is facilitated, the exhaust holes in the outer side ensure that gas is exhausted in order, and through the multi-stage buffering and silencing design, the exhaust noise of the pneumatic pump is effectively lowered, the
structural stability is enhanced, and vibration loss is reduced.