POWER TOOL

PROBLEM TO BE SOLVED: To solve a problem of operability wherein a user needs to hold an electric tool to prevent the electric tool from being swung by holding a handle part with large force, since the electric tool is swung to an opposite side of a screw fastening direction by reaction when speed is...

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1. Verfasser:	KONDO TAKAYOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	BORING COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDEDFOR DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOTPARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOTOTHERWISE PROVIDED FOR HAND TOOLS MACHINE TOOLS MANIPULATORS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PORTABLE POWER-DRIVEN TOOLS TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FORFASTENING, CONNECTING, DISENGAGING OR HOLDING TRANSPORTING TURNING
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creator	KONDO TAKAYOSHI
description	PROBLEM TO BE SOLVED: To solve a problem of operability wherein a user needs to hold an electric tool to prevent the electric tool from being swung by holding a handle part with large force, since the electric tool is swung to an opposite side of a screw fastening direction by reaction when speed is changed from a high speed low torque mode to a low speed high torque mode in a variable speed gear automatically changed in speed according to external torque added to a spindle. SOLUTION: Swing moment to swing the electric tool 1 around a machine axis J is made larger than inertia moment (reaction) generated in the automatic speed change. A distance L from the machine axis J to a center G of gravity of a battery pack 5 and weight W of the battery pack 5 therefore are set to be large. When the swing moment becomes large, the electric tool 1 is made harder to be swung by the reaction according to the speed change. COPYRIGHT: (C)2010,JPO&INPIT
format	Patent
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SOLUTION: Swing moment to swing the electric tool 1 around a machine axis J is made larger than inertia moment (reaction) generated in the automatic speed change. A distance L from the machine axis J to a center G of gravity of a battery pack 5 and weight W of the battery pack 5 therefore are set to be large. When the swing moment becomes large, the electric tool 1 is made harder to be swung by the reaction according to the speed change. 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SOLUTION: Swing moment to swing the electric tool 1 around a machine axis J is made larger than inertia moment (reaction) generated in the automatic speed change. A distance L from the machine axis J to a center G of gravity of a battery pack 5 and weight W of the battery pack 5 therefore are set to be large. When the swing moment becomes large, the electric tool 1 is made harder to be swung by the reaction according to the speed change. 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SOLUTION: Swing moment to swing the electric tool 1 around a machine axis J is made larger than inertia moment (reaction) generated in the automatic speed change. A distance L from the machine axis J to a center G of gravity of a battery pack 5 and weight W of the battery pack 5 therefore are set to be large. When the swing moment becomes large, the electric tool 1 is made harder to be swung by the reaction according to the speed change. COPYRIGHT: (C)2010,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record>
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language	eng
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subjects	BORING COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDEDFOR DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOTPARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOTOTHERWISE PROVIDED FOR HAND TOOLS MACHINE TOOLS MANIPULATORS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PORTABLE POWER-DRIVEN TOOLS TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FORFASTENING, CONNECTING, DISENGAGING OR HOLDING TRANSPORTING TURNING
title	POWER TOOL
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