Patent ID: 7717649

Claim:
A suspending hydraulic pillar, comprising: a top cover ( 1 ); an oil cylinder ( 5 ); a movable prop ( 3 ) arranged in the oil cylinder ( 5 ); a sealing cover ( 2 ) arranged in the movable prop ( 3 ); a handle-valve body ( 4 ) arranged between a port of the oil cylinder and the movable prop ( 3 ); a reset spring ( 7 ) connected with the sealing cover ( 2 ); a first oil inlet ( 8 ) on the movable prop; a three-way valve ( 27 ) arranged in the handle-valve body ( 4 ), a dust-prevention ring ( 15 ), a first sealing ring ( 18 ), a second sealing ring ( 20 ), and a first connecting steel wire ( 22 ) arranged between the handle-valve body ( 4 ) and the movable prop ( 3 ) and between the handle-valve body ( 4 ) and the oil cylinder ( 5 ); a second oil inlet connecting the oil cylinder and the three-way valve; a cylinder bottom seat ( 9 ) coupled to the oil cylinder ( 5 ); a third sealing ring ( 24 ) and a second connecting steel wire ( 23 ) arranged between the cylinder bottom seat ( 9 ) and the oil cylinder ( 5 ); a gasket ( 16 ) arranged below the sealing cover ( 2 ) in the movable prop ( 3 ), the gasket being provided with several through holes, an outer ring of the gasket ( 16 ) being disposed against a shoulder of an inner diameter of the movable prop ( 3 ); a position-limiting steel wire ( 6 ) and a guiding ring ( 26 ) fitted on a groove of an outer diameter of the movable prop ( 3 ); a guiding ring ( 17 ) provided between the handle-valve body ( 4 ) and the movable prop ( 3 ), a through hole in an outer cylinder radial direction of the sealing cover ( 2 ) that matches drilling with the top cover ( 1 ) and the movable prop ( 3 ), and an elastic cylindrical pin ( 12 ) arranged in the through hole.