Competitive Advantages:
Precise force output control, Dynamic adjustability, Improved power efficiency, Computerized control, Large potential for feedback control.
A compliant crank slider with adjustable constant-force output. Constant-force mechanisms (CFM) are used to maintain a constant output reaction force throughout a large range of compressive motion. The invention improves on existing CFM by introducing a second degree of freedom that adjusts the mechanism's output without changing its kinematic structure. This second degree of freedom is the rotation of a compliant beam about its longitudinal axis as it is constrained to the initial plane of bending. In an embodiment, the second degree of freedom is the rotation of both a first compliant beam and a second compliant beam. The resulting change in the constant force mechanism allows for adjustment to a specifiable range of constant-force outputs.In order to fulfill the need for precise force output control in robotic systems, our inventors have designed a CFM that is easily adjustable in a way that directly affects the output force. This is accomplished by rotating the flexible member of a compliant crank slider about its longitudinal axis while constraining it to always bend in the same plane. The force output of the device increases several times over as the compliant beam is rotated. The system is adjusted electronically, presenting a large potential for feedback control. Constant-force devices, such as those in robotic end effectors, become highly adjustable with the option of dynamic adjustment under computer control. Robotic armatures could also employ this system in their joints to maintain static balance in a wide range of positions, improving power efficiency.
Brochure
