A multi-dimensional magnetic negative-stiffness mechanism and a multi-dimensional magnetic negative-stiffness vibration isolation system composed thereof are provided. The multi-dimensional damping system is composed of a positive-stiffness mechanism, a multi-dimensional negative-stiffness mechanism, a floating frame, a vibration isolated body, and a mounting base. The positive-stiffness mechanism is a traditional elastic element connected to the vibration isolated body and the mounting base, and provides supporting forces in an X direction, a Y direction, and a Z direction, and a basic vibration isolation function. The multi-dimensional negative-stiffness mechanism is composed of at least two negative-stiffness magnetic groups. Each negative-stiffness magnetic group may provide one-dimensional or two-dimensional negative stiffness. Through a series connection of the at least two negative-stiffness magnetic groups, a two-dimensional or three-dimensional negative-stiffness effect may be implemented to improve the vibration isolation performance of the system in multiple dimensions.

A multi-dimensional magnetic negative-stiffness mechanism and a multi-dimensional magnetic negative-stiffness vibration isolation system composed thereof are provided. The multi-dimensional damping system is composed of a positive-stiffness mechanism, a multi-dimensional negative-stiffness mechanism, a floating frame, a vibration isolated body, and a mounting base. The positive-stiffness mechanism is a traditional elastic element connected to the vibration isolated body and the mounting base, and provides supporting forces in an X direction, a Y direction, and a Z direction, and a basic vibration isolation function. The multi-dimensional negative-stiffness mechanism is composed of at least two negative-stiffness magnetic groups. Each negative-stiffness magnetic group may provide one-dimensional or two-dimensional negative stiffness. Through a series connection of the at least two negative-stiffness magnetic groups, a two-dimensional or three-dimensional negative-stiffness effect may be implemented to improve the vibration isolation performance of the system in multiple dimensions.

A spring system that includes a compressible material that is used to control the speed of the rod movement.

A front fork leg includes an inner chamber that absorbs by a gas spring a shock caused on a vehicle; an auxiliary gas spring chamber communicating with the inner chamber; an auxiliary piston provided in the auxiliary gas spring chamber; and a gas spring chamber side gas chamber sectioned by the auxiliary piston and communicating with the inner chamber, and the auxiliary piston moves to increase a volume of the gas spring chamber side gas chamber, as pressure inside the inner chamber increases.

A suspension apparatus includes a first tube and a second tube that are telescopic and that are disposed on a vehicle body side and on a wheel side, respectively; a cylinder that is provided in the first tube; a rod that is provided in the second tube; a piston that is provided on the rod, slidingly contacts with an inner circumferential surface of the cylinder, and forms a first gas chamber on a side of the first tube; a coil spring configured to urge the first tube and the second tube in an extension direction; and a spring receiving member that is disposed at a position on a second tube side from a movable region of the piston, the coil spring being disposed between the spring receiving member and the second tube.

Aspects of the subject disclosure may include, for example, a protective shell having an exterior surface and an interior surface and a lever assembly positioned between the interior surface of the protective shell and a portion of a body. The lever assembly includes a lever having an elongated member extending between a first end and a second end and a pivot location. A fulcrum pivotally engages the pivot location of the lever, wherein the lever rotates about the fulcrum in response to an impact force applied along a first direction to the exterior surface of the protective shell. The lever assembly further includes a spring engaging the lever, wherein a rotation of the lever deforms the spring in a second direction to absorb a portion of a kinetic energy of the collision to redirect and reduce a transfer of a portion of force to the body. Other embodiments are disclosed.

A metal stamping tool includes a hybrid magnetorheological-nitrogen spring including a housing having an interior wall defining an interior volume. A fixed divider separates the interior volume into a nitrogen gas chamber and a magnetorheological fluid chamber. A piston extends into both the nitrogen gas chamber and the magnetorheological fluid chamber. The piston defines a magnetorheological fluid gap within the magnetorheological fluid chamber. An electric coil positioned adjacent the fluid gap to apply a magnetic field to magnetorheological fluid within the fluid gap when the electric coil is energized.

According to some embodiments, a vibration-isolating system comprises a case, one or more environmental buffers, a platform suspended within the case by a plurality of wire rope isolators, a crumple zone beneath the platform and configured with one or more shock-absorbing structures, and a container assembly configured on the platform. The container assembly is operable to protect a payload comprising a flexible panel. The container assembly comprises a back panel positioned behind the flexible panel and offset by a first substantially airtight compartment, a front panel positioned in front of the flexible panel and offset by a second substantially airtight compartment, and a stiffener panel positioned in front of the front panel and offset by a third substantially airtight compartment.

Disclosed is a self-centering viscous damper with pre-pressed ring springs. The self-centering viscous damper with pre-pressed ring springs comprises a first inner cylinder, a second inner cylinder, a third inner cylinder, an outer cylinder, a first end cover, a second end cover, a piston, a piston rod, a ring spring, a first connector, a second connector, a first linking nut, a second linking nut, a first outer cover, a second outer cover, a first end and a second end. Due to the interaction between the inner and outer cylinders, the ring springs are further pressed whether a damper is tensioned or pressed. The ring springs have been applied with pre-pressure which overcomes a frictional force and a restoring force when the ring springs are in an initial equilibrium position.

Disclosed is a self-centering viscous damper with pre-pressed ring springs. The self-centering viscous damper with pre-pressed ring springs comprises a first inner cylinder, a second inner cylinder, a third inner cylinder, an outer cylinder, a first end cover, a second end cover, a piston, a piston rod, a ring spring, a first connector, a second connector, a first linking nut, a second linking nut, a first outer cover, a second outer cover, a first end and a second end. Due to the interaction between the inner and outer cylinders, the ring springs are further pressed whether a damper is tensioned or pressed. The ring springs have been applied with pre-pressure which overcomes a frictional force and a restoring force when the ring springs are in an initial equilibrium position.