1007results about "Friction dampers" patented technology

A magnetically actuated motion control device includes a housing defining a cavity and including a slot therethrough. A movable member is located within the cavity and is movable relative to the housing. A magnetic field generator located on either the housing or the movable member causes the housing to press against the movable member to develop a friction force.

A damper for damping vibration and a washing machine having the same are disclosed. The damper includes a damper cylinder; a shaft inserted into the damper cylinder through one end of the damper cylinder, and reciprocating in the lengthwise direction of the damper cylinder; and a friction member provided on the shaft for damping vibration generated by friction with the inner wall of the damper cylinder, and moving vertically to the lengthwise direction of the damper cylinder. The damper adjusts damping force thereof according to vibrated states of an object to be vibrated, and has an improved vibration-damping effect.

A descending control system for a garbage bin includes a bin provided with a pedal to control an active rod to ascend and descend to open and close a lid. A gear and a rack are provided in the bin. Both the gear and the rack are disposed with teeth to engage with each other. The height of the teeth on the rack decreases from a first end toward a second end of the rack. The engagement between the teeth of the gear and the teeth of the rack reduces the closing speed of the lid.

The present invention provides a washer, damper thereof, and control method thereof, by which noise is reduced by adjusting a damping force of the damper in a manner of turning on/off power of the damper according to an oscillation frequency of a vibrating body such as a washer. The control method reduces noise by supplying power to a damper in an excessive vibration state of a vibrating body such as a washer or by cutting off the power supplied to the damper in a normal vibration state of the vibrating body.

Acoustic attenuation materials are described that comprise outer layers of a stiff material sandwiching a relatively soft elastic material therebetween, with means such as spheres, discs or wire mesh being provided within the elastic material for generating local mechanical resonances that function to absorb sound energy at tunable wavelengths.

A particle damper is formed using a solid freeform manufacturing technique. A filler provides support for the closing wall of the cavity as it is formed. Apertures allow at least a portion of the filler to be removed. A particle fill of between 90 and 95% is achieved either by removing sufficient filler to reach this fill or removing excess filler and re-filling with damping particles.

A system that includes a magnetically actuated motion control device comprising a housing defining a cavity and including a slot therethrough. A movable member is located within the cavity and is movable relative to the housing. A magnetic field generator located on either the housing or the movable member causes the housing to press against the movable member to develop a friction force.

A vibration restraining apparatus for vehicle of the present invention is comprised of a housing formed by a rigid material and having an inner space, and fixed to a vibration transmitting member; a filled member sealed in the inner space of said housing in a non-adhered state with leaving a gap with respect to a vibrating direction of said housing, and formed by an elastic body at least at a surface thereof. When the housing resonates by vibration transmitted from the vibration transmitting member, the filled member contacts inner surface parts located at both sides of the housing in a vibrating direction thereof to exercise a damping character due to an energy loss caused by a sliding friction and a collision. Thus, a large damping character occurs inside of the housing to reduce vibration of the housing effectively. As a result, vibration of the vibration transmitting member is effectively reduced. The vibration restraining apparatus for vehicle of the present invention can be lightened in weight, does not have a temperature dependency, and can exercise the vibration restraining effect for plural resonances having different frequencies.

A steering wheel and column assembly is provided for deployment on a vehicle. In one embodiment, the steering wheel and column assemblies comprises: (i) a steering column housing, (ii) a rotatable steering assembly, and (iii) a torsional damper device. The rotatable steering assembly includes a steering column shaft, which is rotatably coupled to the steering column housing, and a steering wheel, which is fixedly coupled to the steering column shaft. The torsional damper device includes a stator body, which is fixedly coupled to the steering column housing, and a rotor body, which is fixedly coupled to the rotatable steering assembly. The rotor body frictionally engages the stator body to produce a predetermined coulomb torque frictional resistance.

A rotary damper includes a housing (1) that has a holding chamber (4), a rotor (2) integral with a gear (2a) disposed rotatably in the holding chamber (4) of the housing (1), and a braking member (3) for controlling the rotation of the rotor (2). The braking member (3) is interposed between the outer periphery of the rotor (2) and the inner periphery the holding chamber (4). A supporting shaft (5) is erected on the bottom part of the holding chamber (4) of the housing (1). A through-hole (7) is bored in the rotor for permitting insertion therein of the supporting shaft (5) in the axial direction of the rotor (2). The rotor (2) is supported through the supporting shaft (5) and the through-hole (7). With this configuration, a stabilized braking force is constantly provided because the rotor (2) does not incline it is being rotated.

A new and novel impact energy attenuation material, impact energy attenuation module employing the material and a fit system for optimizing the performance thereof is provided. Non-linear energy attenuating material consisting of a plurality of loose particles is employed for impact energy dissipation. The loose particles are preferably spherical elastomeric balls. An impact energy attenuation module includes a container that holds the loose particles. The impact energy attenuation module can be provided in a wide range of sizes and shapes and the loose particles can be provided in different materials, sizes, density, compaction and hardness to suit with the application at hand. A matrix of impact energy attenuation module are provided about the surface of a shell to provide the required impact energy attenuation. The material, impact energy attenuation module and system of the present invention are well suited for protection of body parts and other cushioning and protection needs.

Disclosed is a damper for a washing machine, comprising: a cylinder; a rod of which one end is inserted in the cylinder; a sliding rod further extending from the inserted end of the rod; a pad holder slidably installed apart from and on an outer side of the sliding rod; a damping pad formed on an outer circumference of the pad holder and being in contact with an inner circumference of the cylinder; and a rotation-preventing part interposed between the pad holder and the rod, for preventing a conical rotation of the washing machine.

The invention relates to a hybrid energy dissipation vibration damping device which comprises a container, a particle system and viscous liquid. The particle system comprises solid particles, the viscous liquid can be a single type of liquid, or a plurality of types of liquid are mixed with one another to form the viscous liquid, and the viscous liquid is accommodated inside the container; the particle system is arranged in the viscous liquid, can float in the viscous liquid or can be sunken at the bottom of the viscous liquid; the viscous liquid can vibrate in the container. A function mechanism of the hybrid energy dissipation vibration damping device is similar to a function mechanism of a tuned liquid damper, the different types of liquid rub with one another to dissipate energy, structural restoring force is provided for lateral pressure of the container, and structural amplitude is reduced; the solid particles of the particle system are collided with one another and rub with one another in the container to dissipate energy; the viscous liquid rubs with the particle system or the particles to dissipate energy. The hybrid energy dissipation vibration damping device has the advantages that merits of a particle damper and merits of the tuned liquid damper are integrated in the hybrid energy dissipation vibration damping device, and the hybrid energy dissipation vibration damping device is superior to the traditional vibration damper with a single energy dissipation principle owing to various hybrid energy dissipation mechanisms for liquid-phase rubbing energy dissipation, solid-phase collision and rubbing energy dissipation, solid-liquid-phase rubbing energy dissipation and the like.

Disclosed is a high-performance shear friction damper provided in a building construction and attenuating a vibration which is applied to the building construction due to external loads such as an earthquake or strong wind. The high-performance shear friction damper includes first and second support bodies supported to a building construction or damping rods, two prop plates fixed to the second support body and extending to surround both side surfaces of the first support body, friction plates mounted between the first support body and the prop plates, and fastening units each including a tension bolt penetrating the first support body, the friction plates and the prop plates, and a nut fastened to an end of the tension bolt, wherein the first support body has slots extending in a horizontal direction, the tension bolts extend while penetrating the slots to allow the first support body to be slidably movable in the horizontal direction with respect to the friction plates.

A drum type washing machine includes a housing; a rotary drum having a substantially horizontal or slanted rotational axis; a water tub, suspended in the housing, for accommodating therein the rotary drum; a controller for controlling an operation of the washing machine; and a displacement detecting unit disposed between the water tub and a base portion of the housing, for detecting displacement of the water tub. The displacement detecting unit has a primary coil wound around a bobbin; a first secondary coil without overlapping the primary coil and a second secondary coil overlapping the primary coil, the first and the second secondary coils being wound coaxially with the primary coil; and a magnetic body vertically movable inside the bobbin corresponding to a displacement of the water tub.

The invention relates to a hollow shafting particle damper, which is used for comprehensively controlling shafting vibrations. The hollow shafting particle damper comprises two identical semi-cylindrical damping units and a positioning device, wherein the positioning device is positioned between the two semi-cylindrical damping units and is used for fixing the two semi-cylindrical damping units in a hollow shaft. The damper can effectively control the torsional vibration, transverse vibration and longitudinal vibration of a shafting, and is a comprehensive control device for the vibration of the shafting in three directions. The damper is arranged in the shafting so as to effectively make use of the inner space of the shafting and save cost and space.

The invention relates to a plate type variable friction damper, which is primarily used in the field of wind resistance and shock resistance of structures and equipments. The invention makes use of the variation of the friction factor of a friction surface to provide a linear damping variable friction damping device. The plate-type variable friction damper primarily consists of two cover boards, a sliding panel, a pre-tightening bolt, a disk spring and a packing strip. The friction surface of the cover board is divided into three equal parts; the friction factor between the middle friction surface and the friction surface of the sliding panel is smaller than the friction factors between the friction surfaces of the two parts on both sides and the friction surface of the sliding panel. The plate-type variable friction damper avoids the defects of high cost, being maintained intricately and oil leakiness of the traditional linear damping device, such as the oil damper, and overwhelms the problem that the constant friction damper can not keep the same control under different loads. The invention has simple structure, and is produced easily with low cost. The invention is applicable for both large structures and small structures and equipments, and is suitable to be promoted and used in the field of shock resistance of structures and equipments.

Disclosed herein is a washing machine. The washing machine comprises at least one damper disposed between a drive part of the washing machine and a cabinet for performing shock-absorbing operation, a damper bracket fixedly attached to the drive part for transmitting vibration or impact to the at least one damper, and a revolute joint connection unit connected between the at least one damper and the damper bracket. When non-horizontal vibration or impact is transmitted to the at least one damper, the damper is rotated by the revolute joint connection unit. Consequently, the shock-absorbing operation is effectively performed.

A gas spring and gas damper assembly can include a gas spring and a gas damper. The gas spring can include a first end member, a second end member and a flexible wall that at least partially form a spring chamber. The gas damper can include first, second and third damper elements that are telescopically interconnected with one another. The first and third damper elements can be operatively connected to respective ones of the first and second end members. The third damper element includes damper piston having an axial clutch. The second damper element is suspended between the first and third damper elements by biasing elements that engaging the damper piston.

The invention relates to a friction damper. The friction damper comprises a plunger and an arresting cylinder, wherein at least part of the plunger is closely contacted with the working surface of the inner wall of the arresting cylinder, and the friction damper is characterized in that the working surface of the external surface of the arresting cylinder, corresponding to the inner wall of the arresting cylinder, is provided with an annularly closed lacing device. Compared with other structural dampers, the friction damper provided by the invention has the advantages that the structure is simple, a precision part is not needed, the tonnage is large, the journey is long, the manufacturing cost is low, the property is stable, the operation is reliable, the friction damper can reset as being provided with an unloading device, the basic maintenance is not needed, and the service life is long; and the friction damper can be use again after overhauling, and the friction damper has a reproducible characteristic, is very environment-friendly, and can be widely applied to multiple fields such as industry, construction, railway and bridge.

The invention provides a rotating tub washer with an on-off binary damper system for damping a problematic movement between the washer frame and the rotating tub. The on-off binary damper system has a friction pad and a housing friction damper surface, with the friction pad in contact with said housing friction damper surface. The on-off binary damper system has an electromagnetic coil core and a magnetic locking slide with a slide gap between said electromagnetic coil core and said magnetic locking slide to provide for relative sliding motion between the electromagnetic coil core and the magnetic locking slide, wherein a current supplied to said electromagnetic coil core removes the slide gap and electromagnetically locks the electromagnetic coil core and the magnetic locking slide together with the relative sliding motion transferred to the friction pad, with the friction pad rubbing against said housing friction damper surface inorder to dampen the problematic movement between the frame and the rotating tub.