ROTARY TOOL DRIVEN BY BRUSHLESS MOTOR

Title:

ROTARY TOOL DRIVEN BY BRUSHLESS MOTOR

Document Type and Number:

WIPO Patent Application WO/2006/008927

Kind Code:

A1

Abstract:

A rotary tool driven by a brushless motor, which can always appropriately and efficiently perform constant torque tightening work of screws, in which downsizing of the entire device and improvement of torque control accuracy are easily achieved, and conventional problems such as sparks occurring at switch contacts, wear, and negative effects to peripheral electronic apparatuses, electronic circuits, etc. are removed to reduce the sizes of and extend life of constituting components. A lever operation mechanism (20) as a drive switch or first Hall elements (31a, 31b) for detecting each operation of a push scan mechanism (18) and a second Hall element (32) for detecting clutch actuation are installed. Control means (50) is constructed such that a DC brushless motor (12) is rotatingly driven based on an operation signal by the first Hall elements (31a, 31b) and the drive is stopped based on an actuation signal of the second Hall element (32).

Inventors:

TOTSU KATSUYUKI (JP)

Application Number:

PCT/JP2005/011932

Publication Date:

January 26, 2006

Filing Date:

June 29, 2005

Export Citation:

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Assignee:

TOTSU KATSUYUKI (JP)

International Classes:

B25B23/14; B25B23/147; B25B23/157; H02P6/06; H02P6/08; H02P6/24; (IPC1-7): B25B23/14; B25B21/00; H02P6/22; H02P6/24

Foreign References:

JP2002254346A	2002-09-10
JP2002321166A	2002-11-05
JPS5443398A	1979-04-05
JP2004066413A	2004-03-04
JPH0482678A	1992-03-16
JPS5743389B2	1982-09-14
JPS5743389B2	1982-09-14
JP2002254346A	2002-09-10
JP2002321166A	2002-11-05
JPS5443398A	1979-04-05
JP2004066413A	2004-03-04
JPH0482678A	1992-03-16

Other References: