Patent ID: 9510504
Filing Date: 2016-12-06
CPC Classification: A01D,A01G

Claim Text:
1. A work machine, comprising: an elongated operation rod; a front unit disposed at a front end of the elongated operation rod and configured to attach a tool; a rear unit disposed at a rear end of the elongated operation rod and configured to attach a battery; a handle provided on a middle portion of the elongated operation rod, the handle being configured to be gripped by a user such that the front unit is disposed in front of the user and the rear unit is disposed behind the user; a brushless motor disposed in the front unit that is disposed at the front end of the elongated operation rod, and configured to drive the tool; a motor controller disposed in the rear unit that is disposed at the rear end of the elongated operation rod in order to balance the work machine by reducing the size and weight of the front unit, and electrically coupled with the battery; and a plurality of motor power lines disposed along the operation rod and configured to electrically couple the motor controller with the brushless motor, wherein the motor controller includes a plurality of switching elements configured to switch a direction of electric current flowing in each of the plurality of motor power lines, the plurality of switching elements being disposed in the rear unit such that a distance from the plurality of switching elements to the motor is longer than a distance from the plurality of switching elements to the battery.