Shock absorption assemblies are provided. A shock absorption assembly includes an air shock that has a valve body. An air spring tube defines an air spring chamber. A piston rod extends through the air spring chamber to an oil piston head. An air piston head movably coupled to the piston rod. An oil damper tube is coupled to the piston head and is movable relative to the piston rod and the air spring tube. The shock absorption assembly further includes a mechanical spring disposed radially outward from, and that annularly surrounds, at least a portion of the air shock.

A digital printing film winding structure is provided, and belongs to the technical field of film winding in digital printing. A rotatable bracket is arranged on a machine body of a digital printing machine. One end of the bracket is connected to the machine body. An adjustment device is arranged at an other end of the bracket. Then, a roller traction part of the adjustment device is rotatably arranged on the other end of the bracket. A roller of the roller traction part abuts against a winding shaft. As the film is wound, a diameter of a master roll increases, which can reduce the rotation speed of the winding shaft, so as to solve the problem that a tension sensor is easily damaged or easily malfunctions when used in a place with high humidity.

A piston and cylinder type damper with a cylinder containing damping fluid. The damper is operable to perform a compression stroke and a return stroke. A piston rod that can engage with both a piston assembly and a return means. A sealing element is movable axially with respect to said piston rod such that said sealing means is operable to engage with both said piston assembly and said return means, such that, in said compression stroke the sealing means engages solely with said piston assembly, and in said return stroke engages solely with said return means.

A hydraulic damper comprises a main tube, a piston assembly, a base valve assembly, and a compression stop assembly. The compression stop assembly includes an insert defining an inner chamber, and a sleeve displaceable along with the main piston assembly and configured to be slidably introduced inside the inner chamber. The sleeve has a diameter lower than the diameter of the main tube defining a first external flow channel between the sleeve and the main tube; the sleeve is attached to the piston assembly by a spring disposed within the sleeve; and the insert is provided with a plurality of axially-spaced holes and has an annular flange adjoining the inner wall of the main tube and separating the compression chamber from a second external flow channel between the radially external outlets of the holes and the base valve assembly.

An embodiment of the present disclosure provides a shock absorber including a piston valve configured to be in a tube, a body valve installed at a lower side of the tube, a piston rod configured to having one end protruding while penetrating the piston valve, an upper guide member interposed between the piston valve and the body valve and having a plurality of upper guide flow paths formed outside a periphery of the upper guide member, and a plurality of upper guide holes formed inside the periphery of the upper guide member, and a hollow cylindrical expansion member having expansion through-holes through which the fluid having passed through the plurality of upper guide flow paths and the plurality of upper guide holes passes, the hollow cylindrical expansion member being configured to block the upper guide flow paths when the hollow cylindrical expansion member adjoins the upper guide member.

The present invention proposes a self-resetting shear-resistant device with low prestressing requirements and force transmission through a unidirectional clamp, comprising: a replaceable energy dissipation system, a self-resetting prestressing system, and a support and transmission mechanism for installing the energy dissipation system and the self-resetting prestressing system, wherein the energy dissipation system, the self-resetting prestressing system and the support and transmission mechanism form an integrated body, which is connected to an outside to import energy through the support and transmission mechanism; wherein when the present device undergoes shear deformations, the energy dissipation system therein is subjected to tensile yield deformations, and at the same time, the self-resetting prestressing system is subjected to tensile elastic deformations, with resetting completed by restoring forces produced by deformations of the self-resetting prestressing system in a process of loading.

A damper includes a damper housing, a fluid chamber in the damper housing, a damping fluid in the fluid chamber, a piston displaceable in the fluid chamber, a piston rod connected to the piston, and a volume compensating device in the damper housing. The volume compensating device compensates for a displaceable volume of the damping fluid when the piston rod is immersed into the fluid chamber, and includes a seal to seal the fluid chamber relative to the piston rod and/or relative to an inner wall of the damper housing, a support element to guide the seal, a spring element to reset the seal after a damping stroke at least partially into an initial position. The spring element, the seal, and/or the support element form a common compensating member having an integral one-piece configuration. The compensating member is configured to bear loosely against a cover for closing the damper housing.

Present disclosure A hydraulic stopping damper includes a cylinder in which a work fluid is stored, a piston rod coupled such that one side of the piston rod is to be inserted into an inner space of the cylinder, and a rod guide through which the piston rod passes and coupled to one side of the cylinder. The hydraulic stopping damper includes a rebound spring surrounding the piston rod and disposed in an inner space of the cylinder, and a shock mitigator between the rod guide and the rebound spring, the shock mitigator configured to generate a damping force by a hydraulic pressure of the work fluid when one side of the rebound spring compressed in response to a rebound stroke of the piston rod is inserted into the rod guide.

A coupled-beam energy harvesting damper (CBEHD) is disclosed. The device includes a support structure, at least one coil-bearing beam, and at least two magnet-bearing beams positioned adjacent the coil-bearing beam. One or more coils wound on a coil spool are secured along the coil-bearing beam, and at least one magnet assemblyincluding a permanent magnet within a housing pipespans between adjacent magnet-bearing beams and passes through a bore of at least one coil spool. Relative motion between the beams under external excitation induces an electromotive force (EMF) in the coils, thereby converting vibrational energy into electrical power. The CBEHD may operate as an energy harvester, a vibration damper, or both. Arrays or containerized systems of CBEHDs provide scalable, multi-directional deployment across structural and fluid-interactive environments.

A coupled-beam energy harvesting damper (CBEHD) is disclosed. The device includes a support structure, at least one coil-bearing beam, and at least two magnet-bearing beams positioned adjacent the coil-bearing beam. One or more coils wound on a coil spool are secured along the coil-bearing beam, and at least one magnet assemblyincluding a permanent magnet within a housing pipespans between adjacent magnet-bearing beams and passes through a bore of at least one coil spool. Relative motion between the beams under external excitation induces an electromotive force (EMF) in the coils, thereby converting vibrational energy into electrical power. The CBEHD may operate as an energy harvester, a vibration damper, or both. Arrays or containerized systems of CBEHDs provide scalable, multi-directional deployment across structural and fluid-interactive environments.