Links in Technical objects A link is a fastening unit that attaches two parts of an object together Different types of links have different characteristics

Direct: the parts “fit together” without a linking component, like puzzle pieces or Lego blocks Indirect: the parts need a linking component (like glue, a screw, a rivet…)

Rigid: there is no bending between the linked parts Flexible: one of the linked parts can bend (be deformed) without breaking the object

Removable: the parts can be taken apart without causing damage to the object Non-removable: taking the linked parts apart will damage the object (aka “permanent” link)

Complete: no movement between the linked parts Partial: there can be movement between the linked parts

Types of Guiding Controls Translational: component that allows for translational movement (Ex: groove that allows drawers to slide).

Rotational: Component that allows for rotational movement (Ex: toilet paper dispenser)

Types of Links Motion performed by the guided part determines its link type.

Fixed Link No movement between parts.

Rotating Link Guided part can undergo rotational motion around one axis

Sliding Link Guided part can undergo translational motion on one axis

Sliding rotating link Guided part can undergo rotational and translational motion on the same axis

Spherical Link Guided part can undergo rotational motion in many directions.

Helical Link Guided part can undergo helical motion.