Multifunctional teaching aid based on linkage mechanisms

The utility model provides a multifunctional teaching aid based on linkage mechanisms. The teaching aid comprises a main teaching-aid driving mechanism, a slide block speed description mechanism, a cam curve description mechanism, a connecting rod speed description mechanism and a movement determinacy analysis mechanism which are arranged on a main teaching-aid support. The main teaching-aid support comprises a horizontal substrate and a cuboid frame fixed at one side of the horizontal substrate. The multiple linkage mechanisms arranged on the main teaching-aid support are used to represent knowledge points of different machinery principles, the teaching effect can be improved, and classroom teaching can be more targeted and applicable.