Limit Switch can be divided into two categories according to their uses:
One is general-purpose limit switch, which is mainly used for limit and program control of machine tools, automatic production lines and other production machinery. The other is for lifting equipment, mainly used for limit the travel of cranes and various metallurgical auxiliary equipment.
According to the structure, the limit switch can be divided into three types: button type, single-wheel rotary type and double-wheel rotary type, and their working principles are basically the same. The structure and working process of the travel switch is composed of four parts: the operating mechanism, the base, the shell, and the switch core. The operating mechanism is in contact with the stopper to trigger the action of the switch core; the base is generally pressed with plastic, which is used to install and fix and protect the switch core from external factors; A pair of moving contacts and a pair of moving break contacts; the switch core is the core component, which realizes the connection and disconnection of the circuit according to the action of the operating mechanism.
