A variable damping shock absorber has a sleeve and a piston rod, one end of the sleeve being an opening and the other end being closed, one end of the piston rod being inserted through the opening and slidable in an axial direction inside the sleeve. Two sets of friction plates are arranged in the axial direction between an inner wall of the sleeve and an outer wall of the piston rod. A friction plate is fixed in the axial direction with the inner wall of the sleeve, and a sliding friction force between each friction plate set and the outer wall of the piston rod gradually decreases from the closed end to the opening end of the sleeve. The structure can ensure that the damping force is variable under different load and rotational speed conditions.

A variable damping shock absorber has a sleeve and a piston rod, one end of the sleeve being an opening and the other end being closed, one end of the piston rod being inserted through the opening and slidable in an axial direction inside the sleeve. Two sets of friction plates are arranged in the axial direction between an inner wall of the sleeve and an outer wall of the piston rod. A friction plate is fixed in the axial direction with the inner wall of the sleeve, and a sliding friction force between each friction plate set and the outer wall of the piston rod gradually decreases from the closed end to the opening end of the sleeve. The structure can ensure that the damping force is variable under different load and rotational speed conditions.

A frictional damper is designed with a tubular housing having a longitudinal axis, with a tappet, which is displaceable in the housing along the longitudinal axis and is led out at an open end of the housing, with a frictional element lying against the tappet and with a cap attached to the open end of the housing with axial prestressing relative to the longitudinal axis.

A frictional damper is designed with a tubular housing having a longitudinal axis, with a tappet, which is displaceable in the housing along the longitudinal axis and is led out at an open end of the housing, with a frictional element lying against the tappet and with a cap attached to the open end of the housing with axial prestressing relative to the longitudinal axis.

A damper assembly, in particular for a washing machine, comprises at least one damper which causes a damping effect, in particular an active damper, which can be arranged between two components of the washing machine which are movable relative to one another and can each be connected thereto, a regulation unit which is in signal communication with the damper and is intended to regulate the damping effect of the damper, at least one determination unit, which is in signal communication with the regulation unit, for determining at least one input variable, wherein the regulation unit is designed to transmit a regulation signal to the damper in dependence on the at least one input variable, the damper is designed to variably define its damping effect in dependence on the regulation signal. In addition to the at least one active damper, at least one passive damper can be provided.

A damping integrated device, a damper, and a wind turbine are provided. The damping integrated device includes: a base body including an inner cavity extending in the lengthwise direction thereof; a frequency adjustment component disposed in the inner cavity and including an elastic member and a connecting member; a first connector extending into the inner cavity and at least partially protruding out of the base body in the lengthwise direction, the first connector being capable of moving relative to the base body, to make the elastic member stretch or shrink in the lengthwise direction; and a damping component disposed in the inner cavity, being connected to the connecting member and at least partially abutting against an inner wall of the base body, and the damping component being configured to absorb kinetic energy of the first connector.

A piston housing unit comprises a housing with a longitudinal axis, a piston rod that is displaceable, in particular along the and/or around the longitudinal axis, a guide/damping unit for guiding and damping the displacement of the piston rod.

A shock absorber comprises a housing having a work space, damping fluid present in the work space, a piston unit arranged in the work space with a piston rod having a longitudinal axis, a piston secured to the piston rod, dividing the work space into a first partial work space and a second partial work space, a flow channel connecting the first partial work space and the second partial work space, an adjustment unit for adjusting the damping force of the shock absorber with an adjustment element for adjusting the effective flow cross section area of the flow channel, an adjustment actuator for the automated adjusting of an arrangement of the adjustment element and the piston rod, wherein the adjustment unit is arranged inside the shock absorber.

The invention relates to an industrial truck comprising

a chassis (6),
a mast (8) arranged on the chassis (6) in an upright position, a load-carrying apparatus (36), which has at least one load-receiving means (42) for receiving a load that is to be transported,
a support structure (9) that supports the load-carrying apparatus (36) on the mast (8) and can be moved, together with the load-carrying apparatus (36), upwards and downwards on the mast (8), and comprising
a device (54) for reducing vibrations,
wherein the device (54) for reducing vibrations has at least one additional mass body (60), which is supported by the mast (8) or the components connected thereto and is not constantly rigidly coupled to the mast (8) or the support structure (9) or the load-carrying apparatus (36), but is movably mounted by means of a bearing arrangement (62) such that it is movable relative to the mast (8) in response to mast vibrations, in particular to mast vibrations having horizontal vibration components, in order to counteract mast vibrations.

The invention relates to an industrial truck comprising

a chassis (6),
a mast (8) arranged on the chassis (6) in an upright position, a load-carrying apparatus (36), which has at least one load-receiving means (42) for receiving a load that is to be transported,
a support structure (9) that supports the load-carrying apparatus (36) on the mast (8) and can be moved, together with the load-carrying apparatus (36), upwards and downwards on the mast (8), and comprising
a device (54) for reducing vibrations,
wherein the device (54) for reducing vibrations has at least one additional mass body (60), which is supported by the mast (8) or the components connected thereto and is not constantly rigidly coupled to the mast (8) or the support structure (9) or the load-carrying apparatus (36), but is movably mounted by means of a bearing arrangement (62) such that it is movable relative to the mast (8) in response to mast vibrations, in particular to mast vibrations having horizontal vibration components, in order to counteract mast vibrations.