MULTI-PURPOSE ELECTRIC TOOL AND CONTROL THEREOF

摘要

A multi-purpose electric tool has a motor, an impact block, a detection assembly configured to detect the position and the movement state of the impact block, and a main control circuit board configured to control whether the motor is powered off upon reaching a preset state according to the detected information of the detection assembly. In the control method, the detection assembly feeds back the detected information to the main control circuit board, if the impact block is not impacting reciprocatingly, the main control circuit board performs torque control according to whether the preset state is reached; and if the impact block is impacting reciprocatingly, the main control circuit board enables the motor to output in a normal mode which does not limiting the current.

主权项

1. A multi-purpose electric tool, comprising: a housing, a motor and a transmission mechanism driven by the motor, wherein the transmission mechanism comprises an input shaft directly or indirectly driven by the motor to rotate, an impact block which rotates coaxially and synchronously only along with the input shaft when locked at a first axial position and which rotates coaxially and synchronously along with the input shaft as well as moves reciprocatingly between the first axial position and a second axial position in the axial direction when unlocked, an output shaft driven by the impact block at the first axial position to rotate synchronously, and a locking assembly capable of locking or unlocking the impact block;
wherein the multi-purpose electrical tool further comprises a detection assembly configured to detect the position and the movement state of the impact block, and a main control circuit board configured to control whether the motor is powered off upon reaching a preset state according to the detected information of the detection assembly, wherein the detection assembly is electrically connected to the main control circuit board.