Oiles Corporation

Naohiro Horita

Akihiko Okimura

Yoshiteru Igarashi

Ryohei Kaneko

Masamitsu Kojima

Hiroshi Watanabe

Wataru Nishioka

[Problem] To provide a rotary damper wherein damping torque generated by rotation can be easily adjusted using a simple configuration. [Solution] A rotary damperlimits the movement of viscous fluid contained in a circular cylinder chamber, thereby generating damping torque against applied rotational force. This rotary damperis configured such that: a lidis screwed into a case; and the gap gbetween the lower surfaceof the lidand the upper surfaceof a partition sectionand the gap gbetween the lower surfaceof the lidand the upper surfaceof a vanecan be adjusted by adjusting the amount of screwing of the lidinto the case. This means that adjusting the amount of movement of viscous fluid through the gaps g, gcan adjust damping torque generated by rotation.

Rotary damper

A rotational speed reduction devicefor a truck tailgate includes a housing, a rotordisposed inside the housing, a viscous fluidaccommodated in an inner space, passagesandprovided in the rotor, a one-way valvedisposed in the passage, and a one-way valvedisposed in the passage

Rotational speed reduction device for truck tailgate

A damper includes a vessel for accommodating a viscous fluid in its interior; hampering walls for hampering the flow of the viscous fluid; a partitioning member which partitions each of interior portions into two chambers and is provided rotatably; a communicating hole formed in the partitioning member so as to allow the two chambers to communicate with each other via a variable passage whose passage cross-sectional area changes; a flow limiter to limit the flow of the viscous fluid in the chamber into the chamber through the communicating hole, when the internal pressure of the viscous fluid accommodated in the chamber has exceeded a fixed value on the basis of the rotation of the partitioning member; and a resilient structure to resiliently urge the partitioning member in a direction with respect to the vessel.

Damper and vehicle seat equipped with the damper

A rotational dampercomprising: a casingprovided therein with a partition wall portionprovided with a flow path; a rotation bodyrotatably disposed within the casing and provided with a pair of rotary vanesfor partitioning the inside of the casing into two chambers R, R, in corporation with the casing; a viscous fluid L contained within the casing; lip sealsmounted to the pair of rotary vanes in such a manner that, only when the rotation body rotates and moves in one direction, the lip sealsexpand in the direction perpendicular to the vertical direction to prevent the viscous fluid from flowing between the two chambers; and a lid bodyfor closing the opening of the casing.

Rotational damper and vehicle seat with rotational damper

A rotary damperincludes a synthetic resin-made accommodating casefor accommodating in its interiora viscous fluidwhich is constituted by silicone oil or the like and whose viscosity declines with a temperature rise, and a synthetic resin-made rotorwhich is disposed in the interiorof the accommodating caserotatably, i.e., so as to be rotatable in R1 and R2 directions about an axis O, and which partitions the interiorof the accommodating caseinto at least two chambers, i.e., in this embodiment, two chambers consisting of chambersandand two chambers consisting of chambersand, in cooperation with the accommodating case

The rotary damper comprises: case having viscous fluidfilled cylindrical chamber; rotor housed in the chamber; check valve; and pressure-regulating valve. In the chamber, projecting bulkheads are formed. The rotor comprises: the rotor body and vanes. The check valve closes when the rotor rotates in the normal rotation direction, so as to restrict movement of the viscous fluid between areas-partitioned by the bulkheads and the vanes. On the other hand, the check valve opens when the rotor rotates in the reverse rotation direction, so as to allow movement of the viscous fluid between the areas-. The pressure-regulating valve opens when rotating force applied for rotating the rotor in the normal rotation direction is above a predetermined value, to cancel the restriction of movement of the viscous fluid between the areas-

A damperincludes a vesselfor accommodating a viscous fluidin its interior; hampering wallsandfor hampering the flow of the viscous fluid; a partitioning memberwhich partitions each of interior portionsandinto two chambersandand is provided rotatably; a communicating holeformed in the partitioning memberso as to allow the two chambersandto communicate with each other via a variable passagewhose passage cross-sectional area changes; a flow limiting meansfor limiting the flow of the viscous fluidin the chamberinto the chamberthrough the communicating hole, when the internal pressure of the viscous fluidaccommodated in the chamberhas exceeded a fixed value on the basis of the rotation of the partitioning member; and a resilient meansfor resiliently urging the partitioning memberin an Rdirection with respect to the vessel

A rotary damperincludes a synthetic resin-made accommodating casefor accommodating in its interiora viscous fluidwhich is constituted by silicone oil or the like and whose viscosity declines with a temperature rise, and a synthetic resin-made rotorwhich is disposed in the interiorof the accommodating caserotatably, i.e., so as to be rotatable in Rand Rdirections about an axis O, and which partitions the interiorof the accommodating caseinto at least two chambers, i.e., in this embodiment, two chambers consisting of chambersandand two chambers consisting of chambersand, in cooperation with the accommodating case

A damper includes a vessel; a partitioning member which partitions the interior of the vessel into two chambers for accommodating a viscous fluid, and which rotates together with the vessel in a direction and is movable in an axial direction; a moving force imparting structure for imparting to the partitioning member a moving force in a direction by the input of rotation in a direction; a resilient structure for resiliently urging the partitioning member in a direction; a through hole for allowing the chambers inside the vessel to communicate with each other; and an allowing/limiting member which allows the viscous fluid to flow reciprocally between the chambers through the through hole, and which limits the flow of the viscous fluid in one chamber into the other chamber in the direction through the through hole.

Damper and vehicle seat having the damper

A damper includes a vessel; a partitioning member which partitions an internal space of the vessel into two accommodation chambers for accommodating a viscous fluid and which is movable with respect to the vessel; a moving force imparting device for imparting to the partitioning member a moving force in an Adirection by the input of rotation in an Rdirection with respect to the vessel, so that the moving velocity is set to one corresponding to the rotating velocity of that input of rotation; a resilient device for resiliently urging the partitioning member in an Adirection; a communicating hole formed in the partitioning member; and a flow limiting device for limiting the flow of the viscous fluid in the accommodating chamber into the accommodating chamber through the communicating hole when the internal pressure of the viscous fluid accommodated in the accommodating chamber has exceeded a fixed value.

A damperincludes a vessel; a partitioning memberwhich partitions the interior of the vesselinto two accommodation chambersandfor accommodating a viscous fluid, and which rotates together with the vesselin an R direction and is movable in an axial direction A; a moving force imparting meansfor imparting to the partitioning membera moving force in an Adirection by the input of rotation in an Rdirection; a resilient meansfor resiliently urging the partitioning memberin an Adirection; a through holefor allowing the two accommodation chambersandinside the vesselto communicate with each other; and an allowing/limiting memberwhich allows the viscous fluidaccommodated in the two accommodation chambersandin the vesselto flow reciprocally between the two accommodation chambersandthrough the through hole, and which limits the flow of the viscous fluidin the accommodation chamberinto the accommodation chamberin the Adirection through the through holewhen the internal pressure of the viscous fluidaccommodated in the accommodation chamberin the Adirection is generated in excess of a fixed value on the basis of the movement of the partitioning memberin the Adirection.

A damperincludes a vessel; a partitioning memberwhich partitions an internal space of the vesselinto two accommodation chambersandfor accommodating a viscous fluidand which is movable with respect to the vessel; a moving force imparting devicefor imparting to the partitioning membera moving force in an Adirection by the input of rotation in an Rdirection with respect to the vessel, so that the moving velocity is set to one corresponding to the rotating velocity of that input of rotation; a resilient devicefor resiliently urging the partitioning memberin an Adirection; a communicating holeformed in the partitioning member; and a flow limiting devicefor limiting the flow of the viscous fluidin the accommodating chamberinto the accommodating chamberthrough the communicating holewhen the internal pressure of the viscous fluidaccommodated in the accommodating chamberhas exceeded a fixed value.

Growing community of inventors

Kanagawa, Japan

Naohiro Horita