Hitachi Koki Co., Ltd.

Koki Holdings Co., Ltd.

Yoshikazu Yokoyama

Ryosuke Nakano

Shinichi Kakefuda

Shingo Kosugi

Takuhiro Murakami

Hiroto Inagawa

Mitsuo Ogura

Junichi Kamimura

Mitsuyuki Ishikawa

Satsuo Sato

Naoya Eto

Yoshimitsu Kawasaki

Juurou Kobayashi

Masato Sakai

Masanori Okada

Tomoyuki Kawahara

Naoki Tadokoro

Yasutaka Shimizu

Takahiro Hirai

Nobuhito Hosokawa

Ken Inui

Tomoya Ikeda

Yasuoki Kawahata

Jun Kugenuma

A power tool includes a prime mover, an output shaft that extends along a first direction and retains a tip tool and is driven by the prime mover, a support member that supports the output shaft to be drivable, a gear that rotates around an axis extending in a second direction crossing the first direction and transmits a power of the prime mover to the output shaft, and a gear cover that accommodates the gear and the support member. Inside the gear cover, a lubricant retention portion capable of retaining a lubricant is arranged at a side of the support member, and the lubricant retention portion is partitioned from a gear accommodation portion that accommodates a gear by a wall extending in a direction intersecting an extending direction of the output shaft in the gear cover.

Working machine

A powered tool includes a housing, a drive source, a drive body, a sealing part, and a holding part. The drive source is rotatable in the housing. The drive body is supported in the housing and reciprocatable by a driving force of the drive source. The sealing part is in contact with an outer peripheral surface of the drive body. The holding part is positioned around the drive body. The holding part surrounds the sealing part and supports the sealing part to be in contact with the outer peripheral surface of the drive body. The holding part includes a lubrication oil accommodating part retaining a lubricant supplied to the outer peripheral surface of the drive body.

Powered tool

There is provided a power tool in which impact applied to a power transmission portion can be mitigated to thereby suppress components constituting the power transmission portion from being deformed and damaged. The power tool includes a brushless motorhaving a rotation shaft portionrotatable about a rotation axis A, a housingaccommodating therein the brushless motor, a power transmission portionconfigured to receive a rotation force of the rotation shaft portionand to transmit a driving force based on the rotation force, and a driven portionconfigured to be driven by receiving the transmitted driving force. The rotation shaft portionis supported by the housingso as to be movable relative to the housingin an axial direction of the rotation axis A

Power tool

Front feet are provided at a lower part of a cutting-machine main body via a foot holder. Furthermore, a slider positioned on a front side relative to the front feet is provided at the lower part. When a workpiece to be cut is to be cut by a blade, the cutting-machine main body is tilted so as to let the blade go down. When the cutting-machine main body is tilted, a state where the front feet are in contact with the workpiece is switched to a state where the slider is in contact with the workpiece. Then, by moving the cutting-machine main body forward while sliding the slider on the workpiece, the workpiece is cut by the blade. In the cutting operation, the front feet can get away from the workpiece. Therefore, damage of the front feet can be prevented, and the running cost can be suppressed.

Portable cutting machine

A blower apparatus includes: a housing has a discharge port for discharging an air current generated by a fan; and an air conveying tube which includes a plurality of tubular members including first and second tubular members which are connected to each other and which guides the air current discharged from the discharge port in a predetermined direction. The first tubular member includes an outer circumferential surface which is formed so as to gradually decrease in diameter. The second tubular member includes an inner circumferential surface which is formed so as to gradually increase in diameter. The first and second tubular members are connected to each other through the outer circumferential surface and the inner circumferential surface. One of the tubular members which is connected to the housing is configured to be connected to the housing at a plurality of rotational positions about an axis of the tubular member.

Blower apparatus and an air conveying apparatus

Engine blower

In an inexpensive electric tool, a thin insulating layer is provided by pouring an insulating resin material by the injection molding to extend from a rotor supporting portionformed in an outer casing to an inner surface or inner and outer surfaces of the outer casing. Also, as another configuration and method, an insulating piecefor covering the inner surface of the rotor supporting portion is provided, and also an insulating block for covering the rotor supporting portion and supporting ribs is provided.

Electric tool and its insulating method

Disclosed is an electric power tool having a gear mechanism, which reduces a noise by absorbing collision of gears and is resistible to a high torque. A power transmission keycomposed of high-strength plastic is provided between an output shaftand a gearand a plane or a V-groove is formed on each of the output shaftand the gearcontacting the power transmission key

Electric power tool

Disclosed is an electric power tool having a gear mechanism, which reduces a noise by absorbing collision of gears and is resistible to a high torque. A power transmission key composed of high-strength plastic is provided between an output shaft and a gear , and a plane or a V-groove is formed on each of the output shaft and the gear contacting the power transmission key

Growing community of inventors

Hitachinaka, Japan

Yoshikazu Yokoyama