公开(公告)号：EP3854260A1

公开(公告)日：2021-07-28

申请号：EP19862390.2

申请日：2019-01-23

申请人： WIN BALANCE ENTERPRISE CO., LTD

发明人： CHEN, Wei ,  YANG, Jing ,  WANG, Chunlei

IPC分类号： A47B91/16 ,  A47B91/02

摘要： The invention discloses a hydraulic self-adaptive adjusting foot wherein an upper cover is arranged at the upper end of the bottom shell, a piston body arranged in the bottom shell and a piston ring seal arranged between outer circumferential face of piston body and inner wall of bottom shell; a return spring is arranged between bottom of the piston body and the bottom shell while the bottom end of the support post penetrates into the bottom shell from the center hole of the upper cover in a sealing mode. A groove is provided in the center of bottom surface of the flange at bottom end of said support post and a steel ball return spring is set in said groove; in the middle of bottom surface of piston body is provided with spring groove in which sets the top end of return spring; at the axis of spring groove sets the hydraulic oil passage between top end of which and bottom end of steel ball return spring arranges the steel ball. The invention has following merits: the hydraulic oil flows and migrates in upper and lower piston chambers via hydraulic oil passage controlled by steel ball joint work of which and return spring enables supporting objects reach stable state and bottom foot's height be automatically adjusted; the appearance of invention is simple and compact, suitable for repeating adjustments.