Power cutting machine

A power cutting machine comprising:

• a main body including a motor;
• an arm connected to the main body at a base end of the arm, and including a belt transmission mechanism configured to transmit drive power of the motor;
• and
• a working device connected to the head end of the arm, and including a cutting blade configured to be rotated by the power transmitted via the belt transmission mechanism, wherein:
• the arm includes a brake mechanism configured to brake a drive pulley of the belt transmission mechanism;
• the brake mechanism includes:
• a detection mechanism configured to detect movement of the arm;
• a tightening mechanism configured to tighten a tightening belt wound around the drive pulley to bring the drive pulley into a braking state;
• and
• an indicator mechanism configured to visually indicate the braking state;
• the detection mechanism includes:
• a swing lever;
• and
• a mass part configured to move within the swing lever;
• and
• the indicator mechanism includes:
• at least a head end of the mass part, which moves with respect to the swing lever to provide a visual indication of the braking state.