Hydraulic composite bushing, and sealing method for same

A hydraulic composite bushing, comprising:

• a core shaft, an outer surface of which is provided with a flow channel groove continuously extending in a spiral shape;
• a rubber member, arranged on the core shaft and provided with two recesses diametrically opposite to each other, the recesses being arranged radially outside of the flow channel groove;
• a support ring, arranged around the rubber member, and covering the recesses to form two hydraulic chambers for accommodating hydraulic fluid;
• an outer cover press-fitted on the support ring from a radially outer side thereof;
• and
• a sealing device mounted at an end of a flow channel pipe arranged in the flow channel groove,
• wherein two ends of the flow channel pipe pass through the rubber member along a radial direction to extend into said two hydraulic chambers, respectively, so that said two hydraulic chambers are in communication with each other through the flow channel pipe,
• wherein the sealing device is arranged at each end of the flow channel pipe,
• wherein one end of the sealing device is arranged in the flow channel groove while the other end thereof passes through the rubber member to extend into a corresponding hydraulic chamber, thus forming a seal between the flow channel pipe and the flow channel groove,
• wherein a pressing sleeve is provided between the core shaft and the rubber member and arranged for press-fitting the flow channel pipe into the flow channel groove,
• wherein the sealing device comprises a cylindrical sealing body, which is provided with a mounting portion axially penetrating the sealing body and a rectangular through hole extending in the radial direction, and
• wherein the end of the flow channel pipe passes through the rectangular through hole and is fitted in the mounting portion, the pressing sleeve filling the rectangular through hole to enclose the flow channel pipe.