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1. (WO2018003370) DRIVING DEVICE

Pub. No.:    WO/2018/003370    International Application No.:    PCT/JP2017/019712
Publication Date: Fri Jan 05 00:59:59 CET 2018 International Filing Date: Sat May 27 01:59:59 CEST 2017
IPC: B25C 1/06
B25C 1/04
Inventors: NOGUCHI Yuta
野口 裕太
MASHIKO Hironori
益子 弘識
UEDA Takashi
上田 貴士
The purpose of the present invention is to achieve a driving device wherein an electric motor is controlled in accordance with changes in circumstances that affect the stop position and moving speed of a piston from the bottom dead center side to a top dead center side. A driving device 1 comprises a wheel 50 that is rotationally driven by an electric motor, a plurality of pins 52 that are provided on the wheel 50 along the circumferential direction of the wheel 50, a piston 11 housed in a cylinder 10 so as to be able to reciprocate, a driver blade 30 that reciprocates together with the piston 11, a plurality of racks 32 that are provided on the driver blade 30 along the axial direction of the driver blade 30, and a controller that controls the electric motor with pulse width modulation. The controller changes the duty cycle of a switching element provided on the feed line of the electric motor in accordance with a change in the amount of remaining battery power that is one circumstance that affects the moving speed of the piston 11 from the bottom dead center side to the top dead center side.