Rechargeable electric power tool
A rechargeable electric power tool includes a motor that includes a rotation shaft, a motor housing that houses the motor, a gear housing disposed ahead of the motor, a final output shaft that is held onto the gear housing and perpendicular to the rotation shaft, and a loop-shaped handle housing disposed at a rear of the motor housing, and a battery mounting portion configured to hold two battery packs is disposed at a rear portion of the handle housing.
1. A rechargeable electric power tool comprising:
a brushless motor that includes a rotation shaft oriented in a front-rear direction;
a motor housing that houses the brushless motor;
a gear housing disposed on a front side of the brushless motor;
a final output shaft that (1) is supported by the gear housing and (2) extends in a direction transverse to the front-rear direction;
a controller configured to control the brushless motor; and
a loop-shaped handle housing disposed at a rear side of the motor housing, wherein:
the handle housing includes:
a battery mounting portion that extends in the direction transverse to the front-rear direction and is configured to hold a battery pack;
a grip portion that extends in the front-rear direction, a switch being disposed at the grip portion; and
a controller housing portion that (1) extends in the front-rear direction and (2) is spaced from the grip portion in the direction transverse to the front-rear direction, and
the controller is positioned in the controller housing portion and extends in the front-rear direction such that a largest dimension of the controller is in the front-rear direction.
2. The rechargeable electric power tool according to claim 1 , wherein
airflow generated by rotation of a fan disposed at the rotation shaft passes through the controller housing portion to cool the controller.
3. The rechargeable electric power tool according to claim 2 , wherein
an air intake opening for generating the airflow is formed on a lower surface of the controller housing portion.
4. The rechargeable electric power tool according to claim 3 , wherein:
the handle housing includes a tubular portion disposed at a front side of the grip portion and the controller housing portion; and
the airflow passes through the tubular housing portion.
5. The rechargeable electric power tool according to claim 4 , wherein
the airflow passes through the controller housing portion to cool the controller.
6. The rechargeable electric power tool according to claim 3 , wherein the controller is located between the air intake opening and the fan.
7. The rechargeable electric power tool according to claim 1 , wherein:
an LED is in the controller housing portion, at a front side of the controller.
8. The rechargeable electric power tool according to claim 1 further comprising:
a speed switching lever disposed at a lower portion of the gear housing.
9. The rechargeable electric power tool according to claim 1 , wherein the center of gravity of the power tool when the battery pack is attached to the battery mounting portion is between a front side of the loop-shaped handle housing and the motor housing.
10. The rechargeable electric power tool according to claim 1 , further comprising a capacitor located between the switch and the controller.