Bridgestone Corporation

Mitsubishi Denki Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Prospira Corporation

Toshiba Storage Device Corporation

Fujitsu Corporation

Riken Corporation

Porspira Corporation

Yasuyuki Nagashima

Akira Ueki

Yuki Satake

Masakazu Nagasawa

Hideki Sugawara

Shingo Oono

Shuhei Ono

Yoshinori Matsumoto

Masataka Kato

Masayuki Doi

Keiichi Yorimitsu

Takanori Shoji

Masaaki Ohashi

Teruko Fujii

Seiji Toda

Hironori Kanno

Motohiro Yanagida

Yoshimasa Baba

Nobuhiro Sugawara

Michihiko Umeda

Kiyotaka Sasaki

Yutaka Higuchi

Takahiro Saito

Hiroshi Tsurumi

Akira Goto

Kenichiro Iwasaki

Kotaro Yamamoto

Yasushige Yano

Masataka Shitara

Rei Mikoshiba

Masahide Kanegae

Hidekazu Masuyama

Toshio Hyodo

Fuminori Saito

Masayuki Kase

Masaaki Tamura

Masakazu Kitahara

Takato Kuji

Katsushi Ohta

Yoshiko Itoh

Katsumi Senoo

Toshikazu Kurihara

Hirotaka Iima

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.

Vibration-damping device

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

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.

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 ().

The present invention is a liquid-tight the vibration-damping device (). In this vibration-damping device (), a limiting passage () includes a main body passage () disposed inside a partition member (), a first communication section () configured to communicate the main body passage () and a first liquid chamber (), and a second communication section () configured to communicate the main body passage () with a second liquid chamber (). At least one of the first communication section () and the second communication section () includes openings ().

A vibration isolator () is a liquid-enclosed vibration isolator and includes: a tubular first mounting member () connected to one of a vibration generator and a vibration absorber, and a second mounting member () connected to the other; an elastic body () elastically connecting the mounting members; and a partition member () partitioning a liquid chamber () in the first mounting member () within which a liquid (L) is enclosed into a primary liquid chamber () that uses the elastic body () as a part of a wall surface thereof and a secondary liquid chamber (), wherein the partition member () is formed with a restriction passage () communicating the primary and secondary liquid chambers () with each other, and a porous body () having numerous pores (), which are disposed in parallel so as to communicate a side of the primary liquid chamber () and a side of the secondary liquid chamber () with each other, is arranged in the restriction passage ().

A vibration isolator includes first and second mounting members; an elastic body connecting the mounting members; a partition member partitioning a liquid chamber in the first mounting member into a primary liquid chamber using the elastic body as a part of a wall surface thereof and a secondary liquid chamber; and a movable member housed in a housing chamber provided within the partition member, the movable member being deformable or displaceable in an axial direction of the first mounting member. The partition member includes communicating holes that extend from a portion of the partition member which is exposed to the primary liquid chamber or the secondary liquid chamber toward an inside of the partition member and are opened toward the movable member. The partition member is equipped with partition plate parts dividing the housing chamber from the primary liquid chamber and dividing the housing chamber from the secondary liquid chamber.

A vibration isolator includes a partition member () that partitions a liquid chamber () in a first mounting member () into a primary liquid chamber () using an elastic body () as a part of a wall surface thereof and a secondary liquid chamber (), and a movable member () housed in a housing chamber () provided within the partition member (), the movable member being free to be deformed or displaced in an axial direction of the first mounting member (). The partition member () is provided with a plurality of communicating holes () that extend from a portion of the partition member () which is exposed to the primary or secondary liquid chamber (or) toward the inside of the partition member and are open toward the movable member (). The partition member () is equipped with partition plate parts (and) of which front and back surfaces are directed in the axial direction of the first mounting member, the partition plate parts dividing the housing chamber () from the primary and dividing the housing chamber from secondary liquid chamber (or). The communicating holes () include communicating pores () which pass through the partition plate parts (and), and each of which has an inner diameter of 3.6 mm or less.

According to one embodiment, A storage device includes a magnetic disk, a head, and a control unit. The magnetic disk includes a plurality of physical sectors having a first length. A logical block having a second length shorter than the first length, and a redundant area having a length of the difference between the first length and the second length are assigned for the physical sectors. The head reads the data from the physical sector of the magnetic disk. The control unit controls to change the second length of the logical block while maintaining the first length of the physical sector in response to reception of a change request for changing the second length of the logical block from a host.

Storage device, controller, and method

A vibrationproof device which is a liquid sealed vibrationproof device includes a tubular first mounting member () that is connected to either one of a vibration generating portion and a vibration receiving portion, a second mounting member () that is connected to other one, an elastic body () that elastically connects the first mounting member () and the second mounting member (), and a partition member () that partitions a liquid chamber () of the inside of the first mounting member () into a main liquid chamber (A) of an upper side having the elastic body as a portion of a wall surface and an auxiliary liquid chamber (B) of a lower side, and a restricting passage () which communicates with the main liquid chamber (A) and the auxiliary liquid chamber (B). In addition, a first liquid (L) is contained as a main liquid and a second liquid (L) which is insoluble in the first liquid (L) is contained as an added liquid in the sealed liquid (L), and the vapor pressure of the second liquid (L) is higher than the vapor pressure of a main component of the first liquid (L) in the same temperature and a specific gravity of the second liquid (L) is lighter than a specific gravity of the first liquid (L).

Growing community of inventors

Yokohama, Japan

Yasuyuki Nagashima