Crane origin

explosion proof electric hoist Cranes are commonly known as crane, crane (Crane) is a kind of lifting machinery, is a for loop, intermittent motion machine. A work cycle comprising: extract means to extract from the articles lifted, and then moved horizontally to the appointed place down the article, followed by reverse movement, so that the extract means to return the home position for the next cycle. Such as fixed-slewing cranes, tower cranes, truck cranes, tires, crawler cranes.
Within a certain range of vertical lifting and carrying heavy loads of multi-level action lifting machinery. Also known as the crane. Are material handling machinery. Crane's work is characterized by intermittent exercise to do that in a work cycle reclaimer, transport, unloading and other movements of the appropriate agency is working alternately. Crane
electromagnetic overhead craneCrane prototype
Chinese ancient irrigated farmland is used orange jib cranes prototype.
The 14th century, Western Europe and the emergence of the human animal driven rotating jib cranes.

The early 19th century, there has been a bridge crane; Crane important wear parts such as shafts, gears and spreader began to use metal materials, and began to use hydraulic drives.
Late 19th century, steam-driven crane gradually replaced the water-driven crane.
Beginning in the 1920s, due to the rapid development of the electrical industry and internal combustion industry to motor or internal combustion engine for a variety of crane power plant is basically formed. Crane