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NOISE REDUCING DEVICE AND CABIN OF CONSTRUCTION MACHINERY HAVING THE SAME
A noise reduction device includes a first noise reduction part and a second noise reduction part. The first noise reduction part includes a first sound absorption member which absorbs noise in a cabin while being installed on an inner surface of a ceiling of the cabin of a unit of construction machinery, and forms a first sound absorption air layer having a first depth from the inner surface of the ceiling while being installed separately from the inner surface of the ceiling of the cabin. The second noise reduction part includes a second sound absorption member which absorbs noise in the cabin while being fixed and installed on the inner surface of the ceiling of the cabin to be close to the first noise reduction part, and forms a second sound absorption air layer having a second depth from the inner surface of the ceiling while being installed separately from the inner surface of the ceiling of the cabin. The noise reduction apparatus can reduce noise in the cabin having various frequencies.
소음 저감 장치는 제1 소음 저감부 및 제2 소음 저감부를 포함한다. 제1 소음 저감부는 건설기계의 캐빈 천장 내부면 상에 고정 설치되어 캐빈 내부의 소음을 흡수하고, 캐빈 천장 내부면과 이격 설치되며 천장 내부면으로부터 제1 깊이의 제1 흡음 공기층을 형성하는 제1 흡음 부재를 포함한다. 제2 소음 저감부는 제1 소음 저감부에 인접하도록 캐빈 천장 내부면 상에 고정 설치되어 캐빈 내부의 소음을 흡수하고, 캐빈 천장 내부면과 이격 설치되며 천장 내부면으로부터 제2 깊이의 제2 흡음 공기층을 형성하는 제2 흡음 부재를 포함한다.
NOISE REDUCING DEVICE AND CABIN OF CONSTRUCTION MACHINERY HAVING THE SAME
A noise reduction device includes a first noise reduction part and a second noise reduction part. The first noise reduction part includes a first sound absorption member which absorbs noise in a cabin while being installed on an inner surface of a ceiling of the cabin of a unit of construction machinery, and forms a first sound absorption air layer having a first depth from the inner surface of the ceiling while being installed separately from the inner surface of the ceiling of the cabin. The second noise reduction part includes a second sound absorption member which absorbs noise in the cabin while being fixed and installed on the inner surface of the ceiling of the cabin to be close to the first noise reduction part, and forms a second sound absorption air layer having a second depth from the inner surface of the ceiling while being installed separately from the inner surface of the ceiling of the cabin. The noise reduction apparatus can reduce noise in the cabin having various frequencies.
소음 저감 장치는 제1 소음 저감부 및 제2 소음 저감부를 포함한다. 제1 소음 저감부는 건설기계의 캐빈 천장 내부면 상에 고정 설치되어 캐빈 내부의 소음을 흡수하고, 캐빈 천장 내부면과 이격 설치되며 천장 내부면으로부터 제1 깊이의 제1 흡음 공기층을 형성하는 제1 흡음 부재를 포함한다. 제2 소음 저감부는 제1 소음 저감부에 인접하도록 캐빈 천장 내부면 상에 고정 설치되어 캐빈 내부의 소음을 흡수하고, 캐빈 천장 내부면과 이격 설치되며 천장 내부면으로부터 제2 깊이의 제2 흡음 공기층을 형성하는 제2 흡음 부재를 포함한다.
NOISE REDUCING DEVICE AND CABIN OF CONSTRUCTION MACHINERY HAVING THE SAME
소음 저감 장치 및 이를 갖는 건설기계의 캐빈
KANG JUNG HWAN (author) / KIM JOO HO (author)
2016-09-28
Patent
Electronic Resource
Korean
IPC:
E02F
Baggern
,
DREDGING
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