公开(公告)号：US20170268594A1

公开(公告)日：2017-09-21

申请号：US15505221

申请日：2014-09-19

申请人： Showa Corporation

发明人： Nobuo MORI ,  Hiroshi ENDO ,  Yu KUROSAKI

IPC分类号： F16F9/48 ,  F16F9/50 ,  F16F9/18

CPC分类号： F16F9/48 ,  B60G13/08 ,  B60G2500/10 ,  F16F9/18 ,  F16F9/185 ,  F16F9/32 ,  F16F9/50 ,  F16F9/5126 ,  F16F2222/12 ,  F16F2228/066 ,  F16F2230/0052 ,  F16F2232/08

摘要： A hydraulic pressure cushioning device includes: a cylinder; a rod movably provided in the cylinder; a first piston valve section that is provided on the rod. The first piston valve section includes: a first piston member and a second piston member that form a channel; and a single first damping valve with which a first flow of the fluid from the first side to the second side in the channel and a second flow of the fluid from the second side to the first side in the channel are controlled; a bypass path which differs from the channel; and a free piston provided on the rod in such a manner that a flow of the fluid is switched between the channel and the bypass path in accordance with a movement position of the rod.