Koki Holdings Co., Ltd.

Hitachi Koki Co., Ltd.

Hideyuki Hashimoto

Yuta Noguchi

Satoshi Abe

Hideyuki Tanimoto

Shingo Yamazaki

Hiroshi Haga

Yuki Takahashi

Tomomasa Nishikawa

Masato Sakai

Hideki Ishida

Takeshi Taniguchi

Katsuhiro Oomori

Akira Matsushita

Takuya Teranishi

Isamu Tanji

Hironori Mashiko

Naoki Tadokoro

Atsuyuki Kikuchi

Takuma Saito

Hideki Yamada

Akira Oono

Kuniaki Kanbe

Daijiro Tanabe

Takahiro Ookubo

Tomoyuki Hoshi

Takehiro Ookubo

The purpose of the invention is to achieve a miniaturized power tool. Provided is a hammer drill (A) that includes: a brushless motor () that is a drive source for a tip tool (); a control unit for controlling the driving of the brushless motor (); a motor housing () to which the brushless motor () is attached; and a handle housing () provided with a grip (). The control unit includes: a switching board () and a Hall element board (); and a converter board () on which an electrolytic capacitor () is installed. The brushless motor () is disposed to be sandwiched between the electrolytic capacitor (), and the switching board () and the Hall element board (), along the axial direction (M) of a drive shaft () that drives the tip tool ().

Power tool

Provided is an electric tool with which work efficiency can be improved. A controller of an electric tool can execute: a first control, whereby during a non-operating state after a motor has started up and before a tip tool is set to be in an operating state, the motor is driven at a slow idling rotation speed, and when the tip tool is set to be in the operating state, the motor is driven at a normal rotation speed which is higher than the slow idling rotation speed; and a second control, whereby in a case where a trigger switch has been turned off in a state where the motor is being driven at the normal rotation speed and the trigger switch is thereafter turned on again under a prescribed condition, the motor is driven at the normal rotation speed regardless of the state of the tip tool.

Electric tool

A drilling tool includes: a drive source; a bit attachment portion to which an end bit is attachable; a power transmission portion configured to apply a motive force to the end bit attached to the bit attachment portion; an operation portion switchable between an ON-state and an OFF-state by a manual operation and configured to receive a setting operation for setting a stop condition; and a controller configured to set the stop condition based on the setting operation, and to start driving of the drive source in response to a first switching operation for switching the operation portion from the OFF-state to the ON-state. In a state where the stop condition is set, even when the operation portion is in the ON-state, the controller stops driving of the drive source in response to the stop condition being met while the drive source is being driven.

Drilling tool

The present invention provides an electric working machine in which a control board can be disposed without limitations based on a length of a brushless motor in a direction along an axial line. The electric working machine comprises: a brushless motor provided with a rotor and a stator; a motor case and a motor housing in which the brushless motor is stored; a control board which is provided outside of the motor housing in a radial direction of an axial line defined at the center of the rotor, and supports the switching elements; a connection board which is provided in the motor case, and supports the sensors; a through hole provided on the motor case; a through hole provided on the motor housing; and leads and signal lines extending from inside of the motor housing to the outside of the motor housing through the holes.

Electric working machine

An impact tool that realizes an ON-lock function with a simple mechanism and makes it possible to switch between activation and deactivation of the ON-lock function with few operation processes is provided. A hammer drill having at least two operating modes including a hammer mode in which an impact force is transmitted to a tool bit whereas a rotational force is not transmitted thereto includes: a motor as a power source; a trigger lever and an ON-lock button that are operated by an operator; a sensor that detects whether a selected operating mode is the hammer mode or not; and a controller that controls the motor based on an operation of the trigger lever and the ON-lock button. When the ON-lock button is operated while the hammer mode is selected, the controller performs ON-lock control to maintain the motor in the operating state even when the trigger lever is not operated.

Impact tool

An electric power tool has a brushless motor for driving a tip tool, and a motor case is at least partly covered by a motor housing made of aluminum alloy and exposed to an outside. A control board provided with a control circuit for controlling the rotation of the brushless motor is disposed adjacent to the motor housing. The brushless motor and a control board are cooled by cooling air generated by a fun, thereby enhancing the cooling characteristics of the motor control circuit.

Power-actuated tool

A power tool includes a housing, a motor, an output unit, and a circuit board unit. The motor is accommodated in the housing and has a rotational axis extending in a top-bottom direction. The output unit is disposed above the motor and extends in a front-rear direction. A power cable is configured to be connected to a power source and is connected to the circuit board unit. The circuit board unit is accommodated in the housing. The circuit board unit comprises a switching element for driving the motor, and a rectifying device configured to rectify an alternating current from the power source to a direct current. The circuit board unit is disposed below the motor and extends in the front-rear direction in the housing.

Power tool having circuit board

A power tool includes a brushless motor, a switching element, a power cable a rectifying device, a heat releasing member. The switching element controls a drive of the brushless motor. The power cable supplies an electric current to the brushless motor from power source. The rectifying device rectifies the electric current from the power cable. The heat releasing member is connected to the switching element and the rectifying device in order to enhance a cooling efficiency for the same.

A fastening machineis provided, which prevents the tip memberfrom wear and improve its durability as well as align a material into which a fastener is to be driven. The fastening machineis provided with a housing, a handleA extended from the housing, a noseextended from the housingand comprising an ejecting mouthto fire a fastenerand a tip memberarranged at the tip of nosein the direction of ejecting the fastener. The tip memberis characterized by comprising a super-hard material memberin the side facing a material into which a fastener is to be driven and in the side opposite to the direction of extending the handleA.

Fastening machine

An electric driver includes a hook portion which is constituted by a deformable hook-like portion and a connecting portion for connecting the hook-like portion to the handle. The hook-like portion is constituted by a base portion connected to the connecting portion and a bent portion continuous to the base portion, and a front end portion continuous to the bent portion and arranged at a position substantially opposed to the base portion. The front end portion and the base portion can be proximate to and remote from each other. The connecting portion holds the hook-like portion in a direction substantially the same as a direction in which the handle extends. The hook-like portion is pivotably held on a first rotating axis center extending in substantially the same direction as the handle.

Growing community of inventors

Ibaraki, Japan

Hideyuki Hashimoto