Ihi Corporation

Shinichi Kaneda

Yutaka Uneura

Yuichi Daito

Hideyuki Kojima

Kenji Bunno

Tomomi Sugiura

Shunsuke Nishii

Yukio Takahashi

Takahiro Kobayashi

Ryota Sakisaka

Kenichi Segawa

Satoshi Kusano

Atsushi Tezuka

Tetsuya Aono

An oil deflector comprising: a cylindrical portion; a first guide surface extending radially outward from the cylindrical portion; and a second guide surface that is located on a radially outer side of the cylindrical portion and extends in a direction that crosses an outer peripheral surface of the cylindrical portion and the first guide surface.

Oil deflector and turbocharger

A turbocharger includes: a bearing; a bearing wall portion having a bearing hole in which the bearing is arranged; a separation wall portion, which is provided on a radially outer side of the bearing hole with respect to the bearing wall portion, and forms an internal space with the bearing wall portion; an oil discharge port, which is formed in the separation wall portion, and communicates with the internal space; and a guide portion, which is provided to the bearing wall portion facing the internal space, and separates away from the oil discharge port in a direction of a plane perpendicular to a center axis of the bearing as approaching the oil discharge port in a direction of the center axis.

Turbocharger

Provided is a mounting structure, including: an impeller including: a main body portion having a through hole; a plurality of blades provided to an outer peripheral surface of the main body portion; and a boss portion, which is a part of the main body portion, and protrudes toward one end side of the shaft with respect to the plurality of blades; a small-diameter portion, which is a part of the shaft; a first large-diameter portion, which is a part of the shaft, is located on another end side of the shaft with respect to the small-diameter portion; and a small-inner-diameter portion of the through hole, which is formed on a radially inner side of the boss portion, and has an inner diameter smaller than an inner diameter of a part of the through hole which is opposed to the first large-diameter portion in a radial direction.

Mounting structure and turbocharger

A turbine shaft includes: a turbine impeller having a protruding portion provided on a back surface of a main body portion thereof and a welded surface provided on the back surface of the main body portion in a radially outer side of the protruding portion; and a shaft having an end hole provided on the one end surface thereof, the end hole in which the protruding portion is inserted, a welding surface provided in a radially outer side of the end hole and welded to the welded surface, a second seal groove provided in another end side with respect to the welding surface, and an enlarged diameter portion formed between the welding surface and the second seal groove, a diameter of the enlarged diameter portion expanding radially outward from the welding surface side toward the second seal groove side.

Turbine shaft and turbocharger

A bearing structure S includes: a bearing hole formed in a housing; a main body portion of a bearing provided in the bearing hole and inserted with a shaft therethrough; damper surface and provided on an outer circumferential surface of the main body portion, the damper surface facing an inner circumferential surface of the bearing hole; thrust surface provided at end portions of the main body portion in an axial direction of the shaft; and thrust back surface portions provided in the main body portion and having an outer diameter larger than those of the damper surface, the thrust back surface portions spaced apart from the damper surface by a distance farther than a distance between each of the damper surface and the inner circumferential surface of the bearing hole and positioned on back sides of the thrust surface.

Bearing structure and turbocharger

A bearing structure includes: a housing; a bearing hole, which is formed in the housing, and receives a bearing configured to axially support a shaft having one end provided with an impeller; a clearance groove, which is formed in an inner circumferential surface of the bearing hole, and communicates with a passage formed on a lower side of the shaft; and an inclined portion formed on an inner wall surface of the clearance groove, which is positioned at least above the shaft.

A turbocharger includes: a bearing housing (housing); a bearing disposed in the housing and having a thrust bearing surface; and a partition wall portion assembled to the housing, the partition wall portion including an inclined surface positioned on an outer side in a radial direction of the thrust bearing surface, extending at least vertically above the thrust bearing surface, and inclined with respect to a direction perpendicular to the axial direction of a shaft.

An actuating rod of an actuator is rotatably connected to a distal end portion of a link member, a connecting pin is integrally provided at a distal end portion of the actuator rod, a pin hole for allowing insertion of the connecting pin is penetrated and formed at a distal end portion of the link member, and a disc spring for biasing the distal end portion of the link member and the distal end portion of the actuating rod in an axial direction (both sides of the axial direction) of the actuating rod as directions opposite to each other between the distal end portion of the link member and the distal end portion of the actuator rod.

Variable flow valve mechanism and turbocharger

A bearing structure includes: a housing; a bearing hole formed in the housing and provided with a bearing for pivotally supporting a shaft; a clearance groove provided in the bearing hole, having an opposing wall portion radially opposed to the shaft, and communicating with an oil drainage passage provided below a shaft center of the shaft; and at least one of a narrow portion or a wide portion in the opposing wall portion of the clearance groove with a boundary right above the shaft center of the shaft, the narrow portion provided in a rear side in a rotation direction of the shaft, the narrow portion having a narrower gap from the shaft than that in a front side in the rotation direction of the shaft, the wide portion provided in the front side in the rotation direction of the shaft, the wide portion having a wider gap from the shaft than that in the rear side in the rotation direction of the shaft.

A bearing structure includes a through-hole penetrating through in the axial direction of shaft, a bearing holder accommodated in the through-hole, a semi-floating metal bearing accommodated in the bearing holder and supporting the shaft inserted into the inside, and a positioning member being inserted into a radial direction of the shaft for both the bearing holder and the semi-floating metal bearing and regulating movement of the semi-floating metal bearing in the axial direction and in a rotating direction of the shaft relative to the bearing holder. For the bearing holder, a press-fit portion to be press-fitted into the through-hole is formed. A gap is formed between at least one of outer circumferential surfaces of both end parts of the bearing holder in the axial direction and the inner circumferential surface of the through-hole.

A bearing structure includes: a housing; a bearing hole formed in the housing; a bearing, which is provided in the bearing hole, and is configured to axially support a shaft having one end provided with a turbine impeller; a space, which is formed in the housing, and is positioned between the impeller and the bearing hole; a passage, which communicates with the space, and extends to a vertically lower side of the bearing hole; a communication opening portion, which allows the passage and the bearing hole to communicate with each other; and a lower wall portion, which is provided in a lower portion including a portion directly below an axis of the shaft between the passage and the bearing hole, and has an inner wall surface being opposed to the shaft and having a curved surface shape with a curvature center positioned on the shaft side.

A bearing structure includes: a bearing hole formed in a bearing housing, a semi-floating metal bearing accommodated in the bearing hole and having a pin hole formed therein; a through-hole formed in the bearing housing and facing the pin hole in the semi-floating metal bearing; a regulating member which is inserted into the through-hole and in which a fixed portion is pressed onto an inner surface of the through-hole for the regulating member to be fixed to the bearing housing at a fixed position where a distal end portion is inserted into the pin hole; a regulating hole opened at a base end in the insertion direction of the regulating member and extending at least to the fixed portion toward the distal end side; and a pressing member provided in the regulating hole to expand the regulating hole by pressing an inner surface of the regulating hole.

A bearing structure includes: an outer circumferential groove formed on an outer circumferential surface of a cylindrical portion of a semi-floating metal bearing, and including two opposed surfaces opposed to each other in an axial direction of a shaft and a bottom surface connected to the two opposed surfaces; a radial hole penetrating a wall portion defining the bearing hole so as to communicate with the bearing hole, and facing the outer circumferential groove of the semi-floating metal bearing; a locking member having a body inserted into the radial hole from the outer side of the shaft, wherein at least part of the body is interposed between the two opposed surfaces and fixed to the outer circumferential groove; and an opposed portion provided in the housing, and opposed to the part of the body of the locking member when the locking member is fixed to the outer circumferential groove.

An wheel fastening inspection method includes: directly or indirectly applying vibration to a turbine shaft to be inserted to a bearing housing, the turbine shaft being provided with wheels at both ends protruding from the bearing housing, at least one of the wheels being fastened by a fastening member, and a rotary member being fastened by a fastening force generated by the fastening member to the turbine shaft to be integrally rotated with the wheel; measuring the vibration of the turbine shaft; and determining whether or not a vibration frequency at which a peak of the measured vibration of the turbine shaft is given is included in a setting range previously set.

Wheel fastening inspection method, wheel fastening method, wheel fastening inspection device and wheel fastening device

A turbocharger includes: a turbine housing including a through-hole through which a turbine impeller is bypassed; and a wastegate valve configured to open and close the through-hole. A biasing portion biases the wastegate valve and a support plate in opposite directions, and restrains rotation of the wastegate valve relative to the support plate.

Growing community of inventors

Tokyo, Japan

Shinichi Kaneda