knikgiek

Knikgiek is a term used in mechanical design to describe a bending jib or articulated arm that combines a linear actuator-driven linkage with a curved or segmented forearm. The name is derived from Dutch roots, with knik meaning bend and giek meaning jib or crane, and it is used in both theoretical discussions and practical prototypes to distinguish non-linear bending joints from conventional straight-link arms.

A typical knikgiek comprises a base support, a central bending element, and an end effector. The bend is produced by a pair of linked segments actuated by electric motors or hydraulic cylinders, coordinated by a control system that ensures smooth curvature. The geometry is designed to provide continuous, variable radius motion rather than a fixed set of joints, enabling tighter placement in confined spaces.

Materials include aluminum alloys, steel, or composite laminates, with bearings and protective casings for industrial environments. Control methods range from simple on/off drive to closed-loop servo control with position sensors and force feedback. Designers evaluate knikgiek by factors such as achievable reach, maximum payload, minibends, and energy efficiency.

Applications include robotics, stage and film equipment, automated handling systems, and assistive devices where a compact, bending reach is advantageous. Advantages cited in design discussions include reduced peak torques during positioning, smoother trajectories, and better obstacle clearance. Limitations include mechanical complexity, higher maintenance demands, and sensitivity to misalignment.

Related topics include articulated arms, jib cranes, non-linear linkages, and parallelogram linkages.