Patent ID: 9590475
Date: 2017-03-07
CPC Classifications: B25F,H02K

Claim:
1. A power tool comprising: a motor including a rotational shaft extending in a front-rear direction; a fan attached to the rotational shaft; a circuit board including a plurality of switching elements; and a housing including a body portion, a handle portion, and a battery retaining portion; the body portion accommodating the motor and the fan; the handle portion extending from the body portion and including an airflow passage in which the circuit board is arranged; the battery retaining portion including an air intake, wherein a wall portion is located between the fan and the circuit board in a radial direction of the fan, is configured to prevent air from flowing from the fan to the circuit board, and includes an opening for airflow from the handle portion into the body portion, and wherein rotation of the fan generates a flow of air that flows through the air intake to the airflow passage, through the airflow passage to the opening, through the opening to the body portion, and inside the body portion.