Damping device

摘要

A damping device includes a cylinder (10) in which a resilient member (20) and a piston (40) are received. A cover assembly (80) and a seal member (30) seal the cylinder (10) and damping medium (18) is filled in the cylinder (10). The piston (40) includes a piston body (42), a connecting portion (44) connected with one end of the resilient member (20), and a neck portion (46) connected between the piston body (42) and the connecting portion (44). The piston body (42) has an opening (50) penetrating through the piston body (42). A control valve (60) is movably mounted to the neck portion (46) to control the opening (50) during operation. A piston rod (70) has one end (70a) connected with the piston body (42) and another end (70b) extending out from the cylinder (10). A damping member (90) is located between the piston (40) and the cover assembly (80). The traveling velocity of the piston (40) is controlled by the control valve (60) to close or to open the opening (50) through which the damping medium (18) passes.