Mechanical concept

Source of the Mechanical Concept

Machinery is the general term for machines and institutions.

The word machine is derived from the Greek Machine and the Latin Machina. The earliest “machine” is defined as the ancient Roman architect Vitruvius in his book “Ten Books on Architecture”, which is mainly used for moving heavy objects. It is different from tools: “There seems to be the following difference between machine (machine) and tool (organon).

That is to say, machinery is produced by most manual labor and great power, such as heavy ballistas and grape presses. The tools are handled carefully by an operator to achieve their goals, such as scorpion light ballistas or unequal circular spiral devices. Therefore, tools and machinery are indispensable for use.

Cylindrical gears existed in ancient Greece. Heron of Alexandria first discussed the basic elements of machinery in the first century. He believed that there are five types of mechanical elements: wheels and shafts, levers, pulleys, wedges, and spirals. Hero’s argument reflects the characteristics of classical machinery. In ancient China, a cross-turning frame that can keep the horizontal position forever was used in the incense burner.

The definition given by the British mechanician R. Willis in his “The Principle of Mechanism” (1841) is: “Any machine is connected in various ways It is composed of a group of components that make one component move, and the other components will undergo a certain movement. The relative movement relationship between these components and the initially moving component depends on the nature of the connection between them.”

The German mechanic F. Reuleaux defined in his “Theoretische Kinematik, Grundzüge einer Theorie des Maschienenwesens, 1875): “A machine is a combination of multiple resisting objects, Its configuration makes it possible to use them to force the mechanical force of nature to do work, while accompanied by a certain definite movement.”

Machinery is a tool device that can help people reduce the difficulty of work or save effort. Items such as chopsticks, brooms, and tweezers can be called machinery. They are simple machinery. The complex machinery is composed of two or more simple machinery. These more complicated machines are usually called machines. From the point of view of structure and movement, there is no difference between mechanism and machine, which is generally called machine.

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