They differ only a little is the concept of different:
1, machinery is the use of mechanics and other principles of the composition of a variety of devices . All kinds of machines, gears, guns, etc. are machinery.
2, the machine is assembled by a variety of metal and non-metallic parts of the device, consume energy, can run, do work. It is used to replace human labor, energy conversion, and produce useful work.
3, the mechanism is formed by two or more components through the activities of the system of components. According to the composition of the relative motion of the components of different institutions can be divided into plane institutions (such as plane linkage, cylindrical gear mechanism, etc.) and space institutions (such as space linkage, worm gear mechanism, etc.).
According to the category of movement vice can be divided into low vice mechanism (such as connecting rod mechanism, etc.) and high vice mechanism (such as cam mechanism, etc.); according to the structural characteristics can be divided into connecting rod mechanism, gear mechanism, inclined mechanism, ratchet mechanism.
By the characteristics of the converted motion or force can be divided into uniform and non-uniform rotating mechanism, linear motion mechanism, commutation mechanism, intermittent motion mechanism, etc.; by function can be divided into safety insurance mechanism, interlocking mechanism, escapement mechanism, etc..
Their **** the same place:
1, are man-made entity combination.
2, each moving entity has a definite relative motion between them.
Expanded:
Service Areas of Mechanical Engineering:
Mechanical engineering has a wide range of service areas, where the use of machinery, tools, as well as energy and materials production sectors, all need the services of mechanical engineering. Modern mechanical engineering has five major service areas:
1, the development and provision of energy conversion machinery, including thermal energy, chemical energy, atomic energy, electrical energy, fluid pressure energy and natural mechanical energy into a variety of mechanical energy suitable for the application of power machinery, as well as mechanical energy into the other energy needed for energy conversion machinery.
2, the development and provision of machinery for the production of a variety of products, including agriculture, forestry, animal husbandry, fisheries machinery and mining machinery, as well as a variety of heavy industry machinery and light industry machinery.
3, the development and provision of machinery to engage in a variety of services, such as material handling machinery, transportation machinery, medical machinery, office machinery, ventilation, heating and air-conditioning equipment, as well as dust removal, purification, muffling and other environmental protection equipment.
4, the development and provision of family and personal life with machinery, such as washing machines, refrigerators, clocks and watches, cameras, sports equipment and recreational equipment.
5, development and supply of various mechanical weapons.
Baidu Encyclopedia - Principles of Mechanics
Baidu Encyclopedia - Machinery