| 主权项 |
1. A weight compensating shock isolator assembly, comprising:
a structural sleeve, a hydraulic cylinder containing hydraulic fluid, at least a portion of said hydraulic cylinder being movable within said structural sleeve, at least one spring with preload biased to return said hydraulic cylinder to an initial position, said at least one spring exerting a spring force that changes during movement of said hydraulic cylinder, a piston assembly disposed within said hydraulic cylinder and said structural sleeve, said piston assembly comprising a piston rod and a piston head, said piston head being attached to one end of said piston rod and an opposite end of said piston rod being fixedly attached to an end of said structural sleeve, an accumulator means disposed in one end of the hydraulic cylinder, a movable separator assembly disposed between the piston head and the accumulator means, said separator assembly comprising a cylindrical body having an outer diameter that substantially corresponds with an interior diameter of the hydraulic cylinder and an inner diameter through which the piston rod moves, the accumulator means being configured to provide a load against the movable separator assembly and having at least one seal element on the outer periphery, and an annular retaining ring disposed between the piston head and the movable separator assembly, the retaining ring having a center opening sized to accommodate the passage of the piston rod, the retaining ring being fixedly attached to the hydraulic cylinder and retaining a bearing having a plurality of circumferentially disposed holes to permit hydraulic fluid to flow therethrough toward the separator assembly when the shock isolator assembly is loaded, said hydraulic cylinder further including a progressively stepped interior bore formed by a single integral wall surface of the cylinder, said interior bore creating a variable annular gap around said piston head upon movement of said hydraulic cylinder in which the variable annular gap around the piston head gradually increases when the hydraulic cylinder is axially moved in a first direction and gradually decreases when the hydraulic cylinder is axially moved in an opposite direction, said piston head further including a plurality of flow control elements disposed parallel to the direction of movement of said hydraulic cylinder and in which hydraulic fluid is forced through and around the piston head with respect to the hydraulic cylinder, to create a resisting force that is stroke and velocity dependent, with a damping constant C changing with stroke of said cylinder and wherein the separator assembly is permitted to move axially within the hydraulic cylinder due to thermal expansion or contraction of contained hydraulic fluid and due to the movement of the hydraulic fluid. |
