Components of a Machine:
1. Power Unit: The source of the machine's energy, converting various forms of energy into machine energy (also known as mechanical energy).
2. Working Unit: The part that directly performs the machine's specific functions and completes production tasks.
3. Transmission Unit: The intermediate device that transmits, converts, or distributes the motion and power from the power unit to the working unit according to work requirements.
4. Control Unit: The part that controls the machine's start-up, shutdown, and changes in motion parameters.
Main Characteristics:
① They are all combinations of physical objects and human intervention;
② Their parts have definite relative motions, meaning that when the position of one part is fixed, the positions of the others are also fixed;
③ In the production process, they can replace human labor to perform useful mechanical work (such as a planer planing workpieces) or convert mechanical energy (such as a generator converting mechanical energy into electrical energy and an internal combustion engine converting heat energy into mechanical energy).
