Multi-mode drill and mode switching mechanism thereof

A multi-mode drill, comprising:

• a housing;
• a motor received in the housing;
• a transmission mechanism received in the housing, the transmission mechanism comprising:
• a gear reduction component driven by the motor;
• and
• a main shaft connected with the gear reduction component and driven by the gear reduction component to rotate;
• and
• a mode switching mechanism for switching the transmission mechanism to operate in different modes, the mode switching mechanism comprising:
• an operation member;
• an actuator actuated by the operation member and engaging with the transmission mechanism;
• and
• at least an elastic energy storage member arranged between the operation member and the actuator,
• wherein the transmission mechanism has a clutch mode and a non-clutch mode, the mode switching mechanism is provided for switching the transmission mechanism to operate in the clutch mode or the non-clutch mode, and the transmission mechanism further comprises a clutch component capable of interrupting the torque output of the main shaft from the motor when a torque greater than a predetermined threshold is imposed on the main shaft in the clutch mode,
• wherein the gear reduction component is a planetary gear reduction component which comprises an internal gear, the clutch component comprises several protrusions located at an end face of the internal gear, several engagement members are arranged to keep engagement with the end face of the internal gear, a pressing member engages with the engagement members, and at least a biasing member biases the pressing member, and
• wherein the actuator comprises at least a protrusion extending along an axis parallel with the central axis, the pressing member defines at least a notch corresponding to the protrusion, the protrusion aims towards the notch in the clutch mode, and the protrusion presses on the pressing member in the non-clutch mode.