Mechanical Grip-Enhancing ExoHand

Dubbed "GripExo", this resulted from a group project in ME122 (Processing of Materials in Manufacturing). The project's prompt focused on developing an assembly and making informed decisions regarding material choice and manufacturing methods (not necessarily reflected in the assembly's prototype), but we decided to put matching effort into the prototype itself. The result is a proof-of-concept of a purely mechanical actuator, delivering grip augmentation on a single knuckle joint. A device using this technology across all fingers could be used to aid grip strength and stamina in industrial applications. This prototype must be manually enabled and disabled, but future developments could include a more intuitive means of activation.

EXTENSION

When GripExo is charged, the user can move their hand freely, unobstructed by the device. A linear sliding mechanism ensures that GripExo's proximal joint remains inline with that of the user

FLEXION

By lifting the rib atop GripExo, grip enhancement is enabled. This action releases a spring-loaded plunger, which in turn applies tension to a cable running through GripExo's proximal joint and enhances the user's proximal grip strength and stamina.

TEARDOWN

Disassembly reveals the simplicity of the design. With the exception of pins and fasteners, GripExo requires only a handful of components. If the desired grip strength can be handled by sintered parts, 3D printing is a viable means of creating components of custom dimensions for a variety of users.