A new prosthetic bionic hand

Prosthetics are a significant engineering challenge because of their conflicting DC motor design goals: high torque, high speed, compact size and the DC motors need to be as energy efficient as possible.

German company Vincent Systems have created a bionic hand prosthesis that is the first commercially available prosthetic delivering haptic feedback about grip strength to its wearer. This is achieved with short pulses of vibration. If the hand were to vibrate evenly, a person becomes familiar to the sensation and eventually stops paying attention to it.

What sets this prostheses apart is that each finger can individually open up. This opens up numerous situations for the wearer such as being able to ride a bike, tie shoelaces, hold a raw egg or open a door. 12 grip patterns are available that can be activated via muscle contractions. Weighing about the same as a human hand it’s available in a version small enough for children, with the youngest wearer being eight years old.

Each individual finger is actively driven by a DC motor, and the thumb is driven by two DC motors. Maxon have up to six brushed DC motors in the hand: DCX 10 DC motors with modified GP 10A planetary gearheads. The drive systems were selected for their compact size and highest energy density currently available from maxon. Plus the drives needed to be durable and function faultlessly for approximately five years while being exposed to diverse and heavy strain every day.

It was important to CEO and founder of Vincent Systems, Stefan Schulz, that patients wouldn’t need their healthy hand to help. “A prosthetic hand should help its wearer and not demand the attention of the good hand.”

For further information please contact maxon motor Australia Tel. +61 2 9457 7477.

 

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About maxon Australia

maxon is a manufacturer of world-class precision drive systems. At maxon, we develop and build high precision electric drive systems that are among the best in the world. We combine brushed and brushless DC motors, gearheads, sensors, and controllers into complete mechatronic drive systems. Since 1961, businesses from a wide range of industries including medical technology, robotics, industrial automation, mobility, and aerospace place their trust in reliable drive systems by maxon. Our drives are perfectly suited for wherever extreme precision and the highest quality standards are necessary and where compromises cannot be tolerated – on Earth, and on Mars. We are driven by progress. We are certain that we can continuously improve – even what seems to be perfect – over and over again. We believe that outstanding engineers and technicians can make a positive impact on the world. This is why we support them in their efforts to go off the beaten path and provide the right drives for their ideas. We do this because we share in their uncompromising drive to excel in technology.

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