Explosive ordnance disposal (EOD) robot arms typically use servo motors or inner-rotor motors, with the core requirements being high precision and compact integration.
1. Application Characteristics of Servo Motors
Taking the publicly documented EODR010-GT1 EOD robot as an example, its arm achieves flexible movement through a combination of harmonic reducers and servo motors. The horizontal rotation angle reaches ±180°, and the arm can also pitch over a wide vertical range. The closed-loop control system and built-in encoder of a servo motor provide accurate position and speed feedback, which is essential for fine operations such as gripping hazardous objects and disassembling devices during EOD tasks.
2. Adaptation Advantages of Inner-Rotor Motors
In scenarios where joint space on the arm is limited, inner-rotor motors with diameters of 30–80 mm are easier to integrate. The diameter-to-length ratio of these motors suits the compact design requirements of the upper limb system. They reduce the overall weight of the arm while ensuring stable torque output. In multi-joint serial EOD arms, inner-rotor motors help lower system complexity and improve adaptability to different mission conditions.
Both motor solutions are applied through modular design to meet different working conditions. Servo motors emphasize motion precision, while inner-rotor motors optimize the balance between size and load. In practice, mixed configurations also exist. For example, servo motors may be used at the main joints to ensure flexibility, while inner-rotor motors are used at the end effector to reduce inertial load.
For non-standard motor housings, adapter flanges, or compact joint components used in these EOD robot arms, Hansheng Automation can provide custom machining services based on customer drawings, supporting prototype development and small-batch production.
