Flexibledrive

Flexibledrive is a term used to describe drive systems that transmit power through flexible elements rather than rigid ones. The approach emphasizes compliance in the drivetrain to accommodate misalignment and to absorb shocks, enabling safer interaction with humans and delicate loads. While there is no single universally adopted specification, flexibledrive generally refers to mechanisms that use flexible shafts, cables, elastomeric couplings, or other deformable components to convey torque and motion.

Operationally, flexibledrives rely on elastic deformation of the transmission medium to convey torque. This requires sensing of torsional deflection and a control strategy that coordinates motor input with the elastic response, often using feedback to limit overshoot and maintain accuracy. Materials used include flexible polymers, metal or composite shafts, and torsion springs.

Advantages include intrinsic shock absorption, reduced peak loads, smoother motion, and easier accommodation of misalignment. The compliant nature also enhances safety in collaborative robotics and allows compact layouts by tolerating angular or lateral offsets.

Drawbacks include lower energy efficiency due to hysteresis and flex losses, wear and aging of the elastic elements, nonlinear stiffness, and temperature sensitivity. Precise control can be more complex than with rigid drives, and maintenance may require inspection of wear in the flexible components.

Applications span robotics, prosthetics, industrial automation, CNC and milling equipment, and aerospace actuators where compliant actuation or controlled energy storage is desirable.

The term flexibledrive is not standardized; it reflects a broader family of compliant and flexible-drive technologies that overlap with concepts such as compliant drives, flexible shafts, and torque-limiting couplings. Related concepts include compliant drive, flexible shaft, torsionally compliant coupling, and soft robotics.