e assembly shows a worm gear mechanism where a worm (screw) meshes with a worm wheel (gear).
The worm shaft (upper shaft with helical thread) transmits motion to the worm wheel (golden gear).
The worm gear reduces speed and increases torque, typically used in machinery requiring high torque and compact design.
The housing supports the shafts and encloses the gear set, providing lubrication and protection.
This design is often used in conveyors, elevators, hoists, and material handling systems.