The invention relates to a coupling device (16) for mounting an airbag module (14) to be oscillating on a steering wheel structure (12) of a vehicle steering wheel (10), comprising a mounting member (18) which includes, relative to a steering wheel axis (A), an axial bottom side (20) which in the assembled state of the vehicle steering wheel (10) faces the steering wheel structure (12) as well as an opposite axial top side (22) which in the assembled state of the vehicle steering wheel (10) faces the airbag module (14), a contact face (24) for a damping element (26) provided on the axial bottom side (20) for oscillating coupling of the mounting member (18) to the steering wheel structure (12), and comprising a locking element (28) disposed on the top side (22) of the mounting member (18) for locking with the prefabricated airbag module (14), wherein the locking element (28) is configured so that the airbag module (14) can be coupled to the mounting member (18) by a locking connection substantially in an axially fixed manner or in an axially restrictedly movable manner.

The invention provides an adjustable stiffness assembly for use in conjunction with a fixed stiffness element to elastically connect a structure to a mass. The assembly includes a structure mount, a mass mount, and a rotatable stiffness element. The rotatable stiffness element rotatably engages with the structure mount and the mass mount, and has a minimum stiffness value with respect to forces in a direction a maximum stiffness value with respect to forces in another direction The fixed stiffness element and the adjustable stiffness assembly together provide a complete stiffness assembly having a total stiffness value with respect to force in the global direction for elastically connecting the mass and the structure. The first rotatable stiffness element is rotatable relative to the structure mount and the first mass mount to vary the total stiffness value of the complete stiffness assembly with respect to force in the global direction.

A spatial large-stroke compliant hinge with hybrid structure, which includes a rectangular planar unit for implementing an out-of-plane torsion function and a crossed-shaped planar unit for achieving an in-plane rotation function. The crossed-shaped planar unit is formed by two flexible straight beam thin sheets intersecting into a crossed-shaped structure with an angle, and the rectangular planar unit and the crossed-shaped planar unit are connected through an external connection or an embedded connection.

A system and method are provided for reducing vibrations and loads in one or more rotor blades on a rotor hub of a wind turbine when the rotor hub is in a locked or idling condition. A mass damper is attached at a fixed location on one or more of the rotor blades and is maintained on the rotor blades during the locked or idling condition of the rotor hub. The mass damper includes a movable mass component that is responsive to changes in the vibrations or oscillations induced in the rotor blades during the locked or idling condition of the rotor hub.

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 damper unit for use in a vibration-reducing assembly for a steering wheel is disclosed. An elastomeric damper element is molded on an inner sleeve and includes a plurality of elastomeric ribs forming a radially outer engagement surface, and a plurality of elastomeric support studs, which are mutually spaced in a circumferential direction are flexible in all directions transverse to said axis. Methods for making a damper unit and a damper assembly are also disclosed.

A highly-efficient new-energy vibration controller integrating passive, semi-active and active control, including a multi-cavity beam, a battery assembly, a wound magnetic device, a damping piezoelectric device and an inertia mass assembly. The wound magnetic device includes a connecting rod, an electromagnetic wire wound on a bottom end of the connecting rod and a magnetic box arranged at a bottom of the inertia mass assembly. A top end of the connecting rod is fixedly connected to a bottom of the multi-cavity beam. The bottom end of the connecting rod passes through a center through hole of the inertia mass assembly and arranged in the magnetic box. The magnetic box is provided with a magnetic field. The damping piezoelectric device is sleevedly arranged on an outer wall of the connecting rod. The damping piezoelectric device and the wound magnetic device are both electrically connected to the battery assembly.

A damper unit for use in a vibration-reducing assembly for a steering wheel is disclosed. An elastomeric damper element is molded on an inner sleeve and includes a plurality of elastomeric ribs forming a radially outer engagement surface, and a plurality of elastomeric support studs, which are mutually spaced in a circumferential direction are flexible in all directions transverse to said axis. Methods for making a damper unit and a damper assembly are also disclosed.

An impact-compensating bucking bar and its use to reduce impacts during riveting, where the bucking bar includes a body; a strike surface on a distal portion of the body, a compensating inertial mass coupled to the body by a flexible and resilient mass support, and a handgrip coupled to the body and configured for the user to urge the strike surface of the bucking bar against a tail of a rivet to facilitate upsetting the rivet tail during riveting. A relative movement of the compensating inertial mass of the bucking bar in response to a strike on the rivet head at least partially dissipates energy imparted to the body during riveting, reducing impact stresses on the bucking bar user.

A hand-held electrically powered cut-off tool (100, 200, 800, 1000, 1900) comprising a first part (110) and a second part (120) arranged vibrationally isolated from each other, the first part (110) comprising an arm (116) arranged to support a cutting disc (130) and an electric motor (140) arranged to drive the cutting disc, the second part (120) comprising front (190) and rear (195) handles for operating the cut-off tool, and a battery compartment (150) for holding an electrical storage device (220, 1800) such as a battery arranged to power the electric motor (140), wherein one or more damping members (170, 1910) are arranged in-between the first part (110) and the second part (120), where at least one damping member (170, 1910) is formed in a resilient material associated with a damping coefficient.