Excavating device with safety mechanism

Provided herein is an electrodynamic excavating device comprising: a power head comprising a motor and a gearbox; a handle frame to which the power head is mounted; the electric power excavating device further comprises a first safety mechanism and a second safety mechanism, the first safety mechanism reduces torque output to the drill bit when the power head rotates around the longitudinal axis at an angle larger than a first threshold value, and the second safety mechanism reduces torque output to the drill bit when the power head rotates around the longitudinal axis at an angle larger than a second threshold value. The second safety mechanism reduces the torque output to the drill bit when the power head rotates about the longitudinal drive axis at an angular velocity greater than a second threshold. 本文中提供了一种电动力挖掘装置，包括：动力头，该动力头包括马达和齿轮箱；手柄框架，该动力头安装到该手柄框架上；以及钻头，该钻头由马达驱动围绕纵向轴线转动，该电动力挖掘装置进一步包括：第一安全机构，其中，当动力头以大于第一阈值的角度围绕纵向轴线自转时，第一安全机构减小对钻头的扭矩输出，以及第二安全机构，其中，当动力头以大于第二阈值的角速度围绕纵向驱动轴线自转时，第二安全机构减小对钻头的扭矩输出。