Rotating body brake device and robot arm having the same

Rotary Brake Device Using Mechanical Contact Between a Locking Protrusion and a Stopper

This technology is a mechanical rotary brake device and a robot arm equipped with it, featuring a locking member supported by a buffer spring on a rotation support coaxially coupled to a rotating body, where a stopper physically contacts the locking protrusion to restrain the rotation.

Existing electronic clutch brake systems have limitations in precision control due to slippage, while friction-based surface contact methods suffer from increased volume, weight, and production costs.

This technology proposes a method where a solenoid-driven stopper makes direct contact with a locking protrusion to mechanically stop rotation, while a buffer spring absorbs the impact force. This achieves reliable, slip-free braking while protecting components. It can be applied to emergency stops and posture maintenance systems for robot arms, ensuring both safety and durability in a compact, lightweight design.

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Key Features:

• A rotation support coupled to the rotating body to rotate together by sharing the same axis of rotation
• A locking member rotatably supported on the rotation support and equipped with a radially protruding locking protrusion
• A stopper movably positioned to contact the locking protrusion and restrain the rotation of the rotation support
• A buffer spring that absorbs the impact force generated during contact to prevent component damage

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This invention was developed with support from the Ministry of Trade, Industry and Energy for the development of a low-cost robot system based on multi-degree-of-freedom passive gravity compensation.