公开(公告)号：US20170164599A1

公开(公告)日：2017-06-15

申请号：US15118109

申请日：2014-10-17

Applicant: KYB Corporation

Inventor： Tatsuo ITO ,  Takanori INADA ,  Takanobu YOSHIDA ,  Tomomichi MIZUKAMI ,  Atsushi OOTA ,  Masaki AKASHI ,  Yasuo TANAKA ,  Hiroki TOKUDA

IPC: A01M7/00 ,  B05B13/00 ,  A01G25/09

CPC classification number: A01M7/0053 ,  A01G25/09 ,  B05B13/005

Abstract: A boom damping device includes a fluid pressure cylinder configured to perform an expansion/contraction operation in conjunction with rotational movement of a boom in a roll direction of a working vehicle, a first pressure accumulator into/out of which an operating fluid flows through a first passage with the expansion/contraction operation of the fluid pressure cylinder, a second pressure accumulator into/out of which the operating fluid flows through a second passage with the expansion/contraction operation of the fluid pressure cylinder, and a shut-off switch configured to shut off the first passage and configured to shut off the second passage if at least either one of a right boom and a left boom is not at a working position expanded in a right-and-left direction of the working vehicle.