SHOCK ABSORBER WITH HYDRAULIC REBOUND SYSTEM

摘要

The ring guide of the hydraulic stop mechanism defines at least one channel spaced from the passage, extending axially from the lower surface toward the upper surface, and terminating adjacent to the catcher. The catcher defines at least one window extending from the upper surface toward the lower surface establishing fluid communication with the channel. The retainer includes a second protrusion disposed at the coupling end of the retainer extending outwardly engaging the piston rod. The piston rod defines a pair of slots. A first slot is spaced from the rod support and the piston and extends about the piston rod for receiving the ring guide. A second slot is spaced from the piston and the first slot, and extends about the piston rod for receiving the second protrusion of the retainer. The ring guide includes a plurality of passages and channels alternating with one another about the ring guide.

主权项

1. A shock absorber assembly comprising;
a housing presenting a wall disposed along a center axis and extending between a first end and a second end and defining an inner surface extending about said center axis enclosing a main chamber between said ends and said inner surface, a piston disposed in said main chamber and slidably engaging said inner surface, a piston rod attached to said piston and axially movable along said center axis, a hydraulic stop mechanism including a force reducing device disposed in said main chamber between one of said ends and said piston and attached to said piston rod and defining a first rebound chamber between said one of said ends and said force reducing device and a second rebound chamber between said force reducing device and said piston for providing additional damping force in response to the axial movement of said piston, said force reducing device including a ring guide extending between a lower surface adjacent to said piston and an upper surface spaced from said lower surface, said ring guide defining at least one passage extending axially from said upper surface toward said lower surface and radially through said ring guide and terminating before said lower surface for allowing hydraulic fluid to flow radially through said passage, a ring slidably disposed about said ring guide between said upper surface and said lower surface and in sealing engagement with said inner surface of said wall and movable along said center axis between an unblocked position and a blocked position with said ring disposed in said unblocked position adjacent to said upper surface to establish fluid communication between said first rebound chamber and said passage and said second rebound chamber and with said ring disposed in said blocked position abutting said lower surface of said ring guide to close the fluid communication between said first rebound chamber and said passage and said second rebound chamber to provide additional damping force, said ring guide defining at least one channel spaced from said passage and extending axially from said lower surface toward said upper surface and radially through said ring guide and terminating before said upper surface for allowing additional hydraulic fluid to flow radially through said ring guide with said ring in said unblocked position to reduce hydraulic fluid pressure exerted on said ring guide.