| 摘要 |
<p>[Problem] To provide a power tool having a gear-shift mechanism that contributes towards improving the smoothness of a gear-shift operation. [Solution] A power tool in which a tip tool (113) is driven and predetermined machining work is performed, the power tool having an input shaft (131), an output shaft (133) for driving the tip tool (113), and a first transmission path (P1) and a second transmission path (P2) for transmitting the rotary force from the input shaft (131) to the output shaft (133). The power tool is configured so that in a case in which the input shaft (131) is caused to rotate in a first direction, the rotary force in the first direction is transmitted via a first transmission path (P1) to the output shaft (133) at a predetermined transmission ratio; and in a case in which the input shaft (131) is caused to rotate in a second direction that is opposite to the first direction, the rotary force in the second direction is transmitted via a second transmission path (P2) to the output shaft (133) at a transmission ratio that is different from the transmission ratio of the first transmission path (P1). Switching the direction of rotation of the input shaft (131) causes the rotation speed of the output shaft (133) to switch while the direction of rotation of the output shaft is maintained.</p> |
