Bridgestone Corporation

Prospira Corporation

Nissan Motor Company Limited

Autoliv Development Ab

Porspira Corporation

Autoliv Asp, Incorporated

Akira Ueki

Yasuyuki Nagashima

Yuki Satake

Masakazu Nagasawa

Motohiro Yanagida

Rei Mikoshiba

Shingo Oono

Hideki Sugawara

Shuhei Ono

Yoshinori Matsumoto

Hiroshi Kojima

Masaaki Ohashi

Kenichiro Iwasaki

Masahiko Kondo

Yuusuke Satou

Yutaka Higuchi

Hironori Adachi

Hoon Moo Choi

Takahiro Saito

Takanobu Sugiyama

Richard Lawrence Matsu

Yukihiro Sugimoto

Raimund Nebel

Remi Baillivet

Yoshiyasu Kimura

Yutaka Tsuchida

Yuta Baba

Shinsuke Sato

Hirokazu Watai

David Palm

Humiharu Kurose

Jean-Bernard Tessier

Yeon Jin Ham

Jea Hyung Oh

Fumiharu Kurose

Yui Sekiya

Kazunori Kobayashi

The present invention includes a first attachment member (), a second attachment member (), an elastic body (), a partition member (), and a movable member (). An orifice passage (), a plurality of first communication holes (), and a second communication hole () are formed in the partition member (). A tubular member () is disposed on a first wall surface () in the partition member (). The plurality of first communication holes () are open to both an inner portion () and an outer portion () on the first wall surface (), and one of the partition member () and the tubular member () forms an elasticity adjusting unit (Z).

Vibration-damping device

A vibration-damping device includes a partition member provided with an orifice passage that allows a main liquid chamber and an auxiliary liquid chamber to communicate with each other, a plurality of first communication holes that allows the main liquid chamber and an accommodation chamber to communicate with each other, and a second communication hole that allows the auxiliary liquid chamber and the accommodation chamber to communicate with each other. A tubular member that protrudes in an axial direction toward the elastic body is disposed on a first wall surface of the partition member to which the first communication holes are open and which constitutes a portion of an inner surface of the main liquid chamber. The plurality of first communication holes are open to both an inner portion located inside the tubular member and an outer portion located outside the tubular member, on the first wall surface.

A partition member includes an orifice passage through which the main liquid chamber and the auxiliary liquid chamber communicate with each other, a plurality of first communication holes through which the main liquid chamber and the accommodation chamber communicate with each other, and a second communication hole through which the auxiliary liquid chamber and the accommodation chamber communicate with each other, in the partition member, a tubular member which protrudes in an axial direction toward an elastic body is disposed on a first wall surface in which the first communication hole opens and which forms a part of an inner surface of the main liquid chamber, the plurality of first communication holes open in both an inner portion located on an inner side than the tubular member and an outer portion located on an outer side than the tubular member of the first wall surface.

A vibration-damping device includes a partition member provided with an orifice passage that allows a main liquid chamber and an auxiliary liquid chamber to communicate with each other, a plurality of first communication holes that allows the main liquid chamber and an accommodation chamber to communicate with each other, and a second communication hole that allows the auxiliary liquid chamber and the accommodation chamber to communicate with each other. A tubular member that protrudes in an axial direction toward the elastic body is disposed on a first wall surface of the partition member to which the first communication holes are open and which constitutes a portion of an inner surface of the main liquid chamber, in which the plurality of first communication holes are open to both an inner portion located inside the tubular member and an outer portion located outside the tubular member, on the first wall surface.

In a vibration isolator of the present invention, an orifice passage () configured to allow a main liquid chamber () and an auxiliary liquid chamber () to communicate with each other, a plurality of first communication holes () configured to allow the main liquid chamber and an accommodation chamber () to communicate with each other, and a second communication hole () configured to allow the auxiliary liquid chamber and the accommodation chamber to communicate with each other are formed in a partition member (), a tubular member () that protrudes in an axial direction toward an elastic body is formed on a first wall surface () of the partition member in which the first communication holes are opened and which constitutes part of an inner surface of the main liquid chamber, and the plurality of first communication holes are opened in both of an inner portion () of the first wall surface positioned inside the tubular member and an outer portion () of the first wall surface positioned outside the tubular member.

Vibration isolator

A vibration-damping device () of the present invention includes a first attachment member (), a second attachment member (), an elastic body (), and a partition member (). In the partition member, a restriction passage () through which the first liquid chamber () and the second liquid chamber () communicate with each other is formed. The restriction passage includes a first communicating portion () which opens to the first liquid chamber, a second communicating portion () which opens to the second liquid chamber, and a main body flow passage () through which the first communicating portion and the second communicating portion communicate with each other. At least one of the first communicating portion and the second communicating portion includes a plurality of fine holes () which are disposed in a flow passage direction of the main body flow passage. In plurality of fine holes, a flow passage length of a fine hole located apart from the other of the first communicating portion and the second communicating portion in the flow passage direction becomes longer.

A restricted passage () of the present invention includes a first communication part () which is open to a first liquid chamber, a second communication part () which is open to a second liquid chamber, and a main body flow path () which allows the first communication part () and the second communication part () to communicate with each other, the main body flow path () includes a swirl chamber () that generates a swirling flow of the liquid according to a flow velocity of the liquid from the other of the first communication part () and the second communication part (), and the swirl chamber () is disposed to be spaced apart from one of the first ID communication part () and the second communication part ().

In the present invention, a restriction passage () includes a first communication portion () that is open to a first liquid chamber, a second communication portion () that is open to a second liquid chamber, and a main body flow path () that is configured to cause the first communication portion () and the second communication portion () to communicate with each other, and in a portion of the main body flow path () connected to at least one of the first communication portion () and the second communication portion (), a guide portion () that is configured to guide a liquid from the other of the first communication portion () and the second communication portion () to an opposed surface () that is opposed to one of the first communication portion () and the second communication portion () in an inner surface of the restriction passage () is disposed.

Anti-vibration device

The invention is a liquid filled type vibration isolating device () which includes a partition member () that partitions a liquid chamber () within a first attachment member () filled with a liquid into a first liquid chamber () and a second liquid chamber (), and in which a restricted passage (), which is configured to allow the first liquid chamber and the second liquid chamber to communicate with each other, is formed in the partition member. The restricted passage includes a first communication part () opening to the first liquid chamber, a second communication part opening to the second liquid chamber, and a main flow passage () that allows the first communication part and the second communication part to communicate with each other. At least one of the first communication part and the second communication part includes a plurality of pores () that penetrate a first barrier () facing the first liquid chamber or the second liquid chamber. At least one pore of the plurality of pores has a flow passage length of the pore that is 3 times or more the minimum value of the internal diameter of the pore.

Vibration isolating device

In a vibration dampening device () in an embodiment, a restriction passage () includes a first communication portion () that is open to a main liquid chamber (), a second communication portion () that is open to an auxiliary liquid chamber (), and a main body flow path () that causes the communication portions to communicate with each other, the first communication portion () includes a plurality of pores () penetrating a first barrier () having a surface () facing the main liquid chamber (), and a protrusion () which protrudes toward the main liquid chamber () or the auxiliary liquid chamber () is formed over an entire circumference of an opening circumferential edge portion of the pore () in the surface ().

Vibration dampening device

A present invention provides an anti-vibration device () which is equipped with a first tubular mounting member () connected to one of a vibration generating part and a vibration receiving part, and a second mounting member () connected to the other thereof; an elastic body () which connects the first mounting member and the second mounting member; and a partition member () which partitions a liquid compartment () in the first mounting member into a first liquid compartment () having the elastic body in a part of a bulkhead, and a second liquid compartment () in an axial direction along an central axis of the first mounting member, and has an orifice passage () through which the first liquid compartment and the second liquid compartment communicate with each other, in which a plurality of ridge parts () extending in a circumferential direction are formed on an inner surface () of the elastic body which defines the first liquid compartment in a radial direction.

An active anti-vibration deviceincludes a pair of elastic connecting partsand, a rod bodythat connects the pair of elastic connecting parts, an inertial massthat is supported by the rod body, a drive partthat reciprocates the inertial mass in an axial direction of the rod body, and a controllerthat is configured to be able to perform acceleration feedback control to control the drive part so that a first force proportional to an axial acceleration of the rod body is generated.

Active anti-vibration device and method of controlling active-vibration device

A limiting passage () includes: a first communication section () that opens to a first liquid chamber; a second communication section () that opens to a second liquid chamber; and a main body flow passage () that is configured to provide communication between the first and second communication sections. At least one of the first and second communication sections includes a plurality of fine holes (). A vortex chamber () is disposed at a portion of the main body flow passage, which is connected to at least one of the first and second communication sections, is configured to form a swirling flow of liquid according to a flow velocity of liquid flowing from the other of the first and second communication sections, and causes the liquid of the swirling flow to flow out through the plurality of fine holes. A barrier wall () in which the plurality of fine holes are formed extends in a direction across a vortex axis along a central axis (O) of the vortex chamber. Among the plurality of fine holes, fine holes located on an inner side in a swirl radial direction across the vortex axis in a top view of the barrier wall have a lower flow resistance than fine holes located on an outer side in the swirl radial direction.

Vibration damping device

A vibration-damping device () of the present invention includes a first attachment member (), a second attachment member (), an elastic body (), and a partition member (). In the partition member, a restriction passage () through which the first liquid chamber () and the second liquid chamber () communicate with each other is formed. The restriction passage includes a first communicating portion () which opens to the first liquid chamber, a second communicating portion () which opens to the second liquid chamber, and a main body flow passage () through which the first communicating portion and the second communicating portion communicate with each other. At least one of the first communicating portion and the second communicating portion includes a plurality of fine holes () which are disposed in a flow passage direction of the main body flow passage. A ratio of a projected area or an opening area of a smallest cross section of the fine holes, which occupies per a predetermined area of the first barrier or the second barrier, gradually decreases as it separates from the other of the first communicating portion and the second communicating portion in the flow passage direction.

A restricted passageway () is provided with a first communication part () which is formed in a first barrier wall () facing a first liquid chamber and opens to the first liquid chamber, a second communication part () which is formed in a second barrier wall () facing a second liquid chamber and opens to the second liquid chamber, and a main body flow path () that is configured to cause the first communication part () and the second communication part () to communicate with each other. At least one of the first communication part () and the second communication part () includes a plurality of fine holes () that pass through the first barrier wall () or the second barrier wall (). A vortex chamber () is disposed in a connection portion with at least one of the first communication part () and the second communication part () on the main body flow path (), figured to form the swirling flow of a liquid depending on a flow velocity of the liquid from the other of the first communication part () and the second communication part (), and is configured to cause the liquid to flow out through the fine holes ().

Growing community of inventors

Tokyo, Japan

Akira Ueki