There are several types of elevators according to their usage:
The passenger elevator, designed for the transport of passengers, requires complete safety facilities as well as certain car interior decoration.
A freight elevator designed primarily for transporting goods, usually accompanied by a person.
Medical elevator, designed to transport beds, stretchers and medical vehicles, the car has long and narrow features.
Elevator for library, office building, hotel to transport books, documents, food and other design elevator.
The elevator with transparent enclosure for passenger sightseeing.
A vehicle lift, used as an elevator to transport vehicles.
Ship elevators, elevators used on ships.
Elevator for construction, construction and maintenance.
Other types of elevator, in addition to the above commonly used elevator, there are also some special use of elevators, such as cold storage elevator, explosion-proof elevator, mine elevator, power station elevator, fireman's elevator, oblique elevator, nuclear island elevator and so on.
An elevator is a vertical elevator powered by a motor and equipped with a box-like pod for multistory building rides or carrying cargo. There are also terraced steps, with stepping plates running continuously on the tracks, commonly known as escalators or escalators. Fixed lifting equipment for specified floors. Vertical elevator has a car, running on at least two columns of the vertical or Angle is less than 15 ° between the rigidity of rail. Car size and structure for passenger access and loading and unloading. It is customary to use the elevator as a general term for vertical transportation in buildings, regardless of the driving mode. According to the speed, it can be divided into low speed elevator (less than 1 meter/second), fast elevator (1 ~ 2 meters/second) and high speed elevator (more than 2 meters/second). Hydraulic lifts began to appear in the mid-19th century and are still used in low-rise buildings. In 1852, a safety lift for wire rope lifting was developed by an American example Otis. In the 1980s, the drive device was further improved, for example, the motor drives the winding drum through worm drive and adopts balance weight. In the late 19th century, friction wheel drive was adopted, which greatly increased the lift height of the elevator.
At the end of 20th century, permanent magnet synchronous tractor was used as power. It greatly reduces the floor space of the machine room, and has the advantages of low energy consumption, high efficiency of energy saving and fast promotion speed, which greatly promotes the development of the real estate towards the super high level.