Ntn Corporation

Ntn-rulon Industries, Co., Ltd.

Sumitomo Chemical Company, Limited

Other

J. Morita Manufacturing Corporation

Nippon Water Blade Co., Ltd.

Fuminori Satoji

Kenji Ito

Isao Komori

Ryouichi Nakajima

Seiji Shimizu

Yoshinori Ito

Natsuhiko Mori

Tetsuya Kurimura

Toshiyuki Mizutani

Yousuke Sugai

Toshihiko Mouri

Masafumi Okuma

Kenichi Mitani

Takahiro Gotou

Noriyoshi Yoshizuka

Tetsuya Yamamoto

Masaharu Hori

Akira Matsui

Kazuo Hirose

Mitsuo Maeda

Kazuo Okamura

Yoshinori Morita

Yoshiharu Inazuka

Hiroyasu Yamauchi

Kimihiko Bito

Takashi Minami

Hisanori Aiga

Noboru Umemoto

Hiroki Manabe

Kenji Itou

Eiichiroh Shimazu

Masayuki Yamazaki

Masaki Egami

Kuniaki Asai

Yasuhiro Yamamoto

Nobuyoshi Yamashita

Tadayasu Kobayashi

Fuyuki Ito

Kazutoyo Murakami

Hiroshi Niwa

Jun Hirade

Tomokazu Sonozaki

Naoaki Tsuji

Tatsuya Hayashi

Katsuo Shibahara

Shigeo Kobayashi

Toshiaki Niwa

Kouyou Suzuki

Eiichiro Shimizu

Yoshinori Itou

Atsuko Yamashita

Takaaki Kawakami

Junichi Kurihara

Ryou Azuma

Shoichi Hashimoto

Takeo Akatsuka

Yoshio Oki

A vehicle-mounted fin type antenna deviceincludes a plurality of antenna unitsto, a circuit boardelectrically connected to the plurality of antenna unitsto, and a radomeaccommodating the plurality of antenna unitstoand the circuit boardin an inside of the radome. The radomeis formed of a resin material that contains a crystalline resin as a base resin and has a deflection temperature under load of 100&#xb0; C. or more.

Cover and vehicle-mounted fin type antenna device

A solid lubricantis formed by molding and firing powder that includes amorphous and self-sintering carbon material powdergraphite powderand a binderThe solid lubricant has high material strength and hardness, and also excellent impact resistance and wear resistance.

Solid lubricant and solid-lubrication rolling bearing

Raw material powder containing metal powder as a main component is molded to form a metal powder molded body ('), and the metal powder molded body (&#x2032;) is sintered to form a metal substrate (). Further, a lubricating member () is made of an aggregate of graphite particles (), and at least a part of a bearing surface () is formed of the fabricating member (). The lubricating member () is fitted into the metal powder molded body (&#x2032;). After that, the metal powder molded body (&#x2032;) is sintered, and at this time, the lubricating member () is fixed onto the metal substrate () with a contraction force (F) generated in the metal powder molded body (&#x2032;).

Slide member and method for producing same

Provided is a sintered bearing () including an inner layer () and an outer layer () formed by integral molding, the sintered bearing () having a bearing surface (A) formed on an inner peripheral surface () of an inner layer (). The inner layer () is made of sintered metal containing Fe and a hardness increasing element (such as Ni or Mo). The outer layer () is made of sintered metal containing Fe and no hardness increasing element. A concentration gradient of the hardness increasing element is present at an interface between the inner layer () and the outer layer ().

Sintered bearing

A separatorincluding a solid lubricant is disposed between adjacent rolling elements. Relative movement of the adjacent rolling elementsand the separatorin a direction of separating apart in a circumferential direction is restricted by restricting members, and the restricting membersare disposed at plural locations in the circumferential direction. A minute gap &#x3b1; is provided between the adjacent restricting members, to allow relative movement therebetween. This can provide a solid-lubrication rolling bearing capable of stably preventing rotational locking and unintended disassembling of the bearing for a long period.

Solid-lubrication rolling bearing

A weld line formed by injection molding of a sealing member is formed at a circumferential position out of deepest portions of axial grooves, which form thinned portions of the sealing member (optimally, in a region of a cylindrical surface between the axial grooves in a circumferential direction). Thus, the sealing member is prevented from being provided with parts having locally markedly low strength, and hence damage to be caused by press-fitting is prevented.

Method of injection molding a sealing member for a fluid dynamic bearing

A fluid dynamic bearing device () includes: a shaft member (); a housing () as an outer member which is arranged on a radially outer side of the shaft member () and is opened at both ends; a radial bearing gap which is formed on a radially inner side of the housing () and faces an outer peripheral surface of the shaft member (); and a lid member () closing an opening on one end side of the housing (), wherein the lid member () is fitted to an outer peripheral surface of the housing () with a fastening allowance which does not affect accuracy of a surface defining an outer diameter dimension of the radial bearing gap so that the housing () and the lid member () are bonded and fixed to each other.

Fluid dynamic bearing device

Providing a fluid dynamic bearing device, wherein the outer member comprises a member formed by a pressing process on a plate member, the radial bearing surface and at least the one of the thrust bearing surfaces of the outer member being formed by the pressing process, and wherein at least a part of the inner member, which forms the radial bearing surface and the thrust bearing surfaces of the inner member, is made of a sintered metal.

Fluid dynamic bearing device and assembly method for same

It is an object of the present invention to provide a bearing member having a highly accurate dynamic pressure generating portion stably at low cost. Dynamic pressure grooves () and () are formed as the dynamic pressure generating portions on an inner circumferential surface of the electroforming portion () by an electroforming process, and injection molding is performed by using a resin while inserting the electroforming portion (), thereby forming a bearing member (). A shaft member () is inserted into an inner circumference of the bearing member.

A fluid dynamic bearing device includes: a shaft member; a bearing sleeve which forms a radial bearing gap between the bearing sleeve and an outer peripheral surface of the shaft member; a housing which accommodates the bearing sleeve and is opened at both ends; and a lid member which closes an opening on one end side of the housing and forms thrust bearing portions. The housing is an injection-molded product into which the bearing sleeve is inserted, and the housing has another end with which a seal portion forming a seal space is integrally formed. The lid member is fitted with the outer peripheral surface of the housing by loose fitting so that the lid member and the housing are bonded and fixed to each other.

A dynamic bearing device allows production of a smaller housing at low cost and suppresses ion elution from the resin portion to thereby maintain cleanliness in the dynamic bearing device and exert a desired bearing performance. A dynamic bearing deviceis equipped with a bearing sleevefixed to the inner periphery of the housing, and a rotary member rotatable relative to the bearing sleeveand the housing, in which the rotary member is supported in the radial direction and the thrust direction in a non-contact manner by a dynamic pressure action of a lubricant fluid generated in a bearing clearance. The housingis formed by injection molding of a resin composition containing polyphenylene sulfide (PPS) as the base resin and PAN type carbon fibers as a filler.

Dynamic bearing device

The present invention aims to achieve a reduction in cost for a fluid dynamic bearing device. The fluid dynamic bearing device supports a shaft member () radially in a non-contact fashion by a dynamic pressure action generated in a radial bearing gap between an outer peripheral surface of the shaft member () and an inner peripheral surface () of a bearing member (), and is composed of the shaft member (), the bearing member (), a cover member (), and a seal member (). The shaft member () is inserted into an inner periphery of the bearing member (), and an opening at a lower end thereof is sealed by the cover member (). The seal member () is attached to an opening at an upper end of the bearing member (), forming a seal space (S) between itself and the outer peripheral surface of the shaft member (). Dynamic pressure grooves (G) of radial bearing portions (Rand R) are formed in an inner peripheral surface () of the bearing member () by molding.

A housing for a hydrodynamic bearing unit of this type is formed from a resin material having high oil resistance and low outgassing property to ensure the cleanliness of the bearing unit. An ester-based lubricating oil is used as a lubricating oil filled inside the hydrodynamic bearing unit, and the housingis formed from an LCP-based resin material.

Hydrodynamic bearing unit

Growing community of inventors

Kuwana, Japan

Fuminori Satoji