Hitachi-johnson Controls Air Conditioning, Inc.

Mitsubishi Generator Co., Ltd.

Mitsubishi Electric Corporation

Koji Yonekura

Naoya Kadota

Kota Yano

Hiroyasu Yoneyama

Hideshi Obara

Dinh Duyanh

Duyanh Dinh

This wedge looseness inspector for a rotary electric machine includes: an inspector including a wedge striker having a tap hammer for striking a wedge, and a wedge vibration detector for detecting vibration of the wedge; and attraction portions connected to the inspector via connection members and being attractable to an outer circumferential surface of a stepped-down portion, wherein the attraction portions have, on an inner side in the axial direction, first attachments that allow adjustment of the attached position in the axial direction of the attraction portions or replacement thereof.

Device for inspecting wedge looseness of rotary electric machine, system for inspecting wedge looseness of rotary electric machine, and method for inspecting wedge looseness of rotary electric machine

A fan includes a fan member, a motor that drives to rotate the fan member, and a rotating shaft that is connected to the fan via a vibration prevention member and transmits a turning force of the motor to the fan. The vibration prevention member is an elastic member that connects an inner cylinder made of metal included in the rotating shaft and an outer cylinder made of metal included in the fan member. At least one of an outer circumferential section of the inner cylinder and an inner circumferential section of the outer cylinder is configured in a polygonal shape when viewed from the rotating shaft direction. A turning force received by the vibration prevention member acts as compression stress on an adhesion interface between a vibration prevention material and metal.

Fan and air conditioner

Growing community of inventors

Tokyo, Japan

Koji Yonekura