New-type noise-reducing sponge for excavating-machine cab

Abstract

The invention aims to provide a new-type noise-reducing sponge for an excavating-machine cab, wherein a high-density sound-absorbing material is selected, sound-absorbing noise-reducing holes at intervals of 8mm are densely distributed in the sponge, the inner surface of each sound-absorbing noise-reducing hole is sandglass-shaped from the top to the bottom, and averagely-distributed annular grooves are arranged on the wall of the inner surface, so that the sound-absorbing rate of the sponge can be increased to 70-80 percent, and the noise-reducing effect is good.

Description

technical field

[0001] The invention relates to a novel noise-reducing sponge for an excavator driver's cab, belonging to the field of construction machinery. Background technique

[0002] At present, most of the noise reduction measures for hydraulic excavator cabs on the market are to add glass fiber and foam polyurethane sponge materials on the hoarding plate near the engine side of the cab and inside the engine hood to absorb sound, while the foam type polyurethane sponge It is a low-density porous material with low sound absorption rate and poor noise reduction effect, which directly affects the operator's comfort and labor efficiency. SUMMARY OF THE INVENTION

[0003] In order to overcome the above defects, ensure a comfortable and convenient operating environment, satisfy human-machine engineering, and help operators work efficiently and reliably, we have invented a new type of noise reduction sponge for excavator cabs, using high-density sound-absorbing materials, ...

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