There is no fundamental difference between the travel switch and the micro switch. The inside of the travel switch is actually a micro switch. The difference between the travel switch is that it has a relatively solid shell, and there is a spring-stretched buffer distance in contact with the moving object, so that After the moving object is in contact, the internal micro switch can act immediately. Due to the buffer distance, the micro switch is protected.
The travel switch is mainly used to convert the mechanical displacement into an electrical signal, so that the running state of the motor can be changed, so as to control the mechanical action or be used for program control. The real use of the travel switch is in industry, where it cooperates with other equipment to form more complex automation equipment.
There are many such travel switches on the machine tool, which are used to control the travel of the workpiece movement or automatic tool feed to avoid collision accidents. Sometimes the travel switch is used to automatically reverse the direction of the controlled object between the two specified positions, so as to obtain continuous reciprocating motion.
In actual production, the travel switch is installed in a pre-arranged position. When the module installed on the moving parts of the production machinery hits the travel switch, the contacts of the travel switch act to realize the switching of the circuit. Therefore, the travel switch is an electrical appliance that switches the circuit according to the travel position of the moving part, and its working principle is similar to that of a button.
Travel switches are widely used in various machine tools and hoisting machinery to control their travel and perform terminal limit protection. In the control circuit of the elevator, the travel switch is also used to control the speed of opening and closing the car door, the limit of automatic door opening and closing, and the upper and lower limit protection of the car.
The travel switch can be installed on relatively stationary objects (such as fixed frames, door frames, etc., referred to as still life) or on moving objects (such as vehicles, doors, etc., referred to as animals). When the animal approaches the still life, the connecting rod of the switch drives the contacts of the switch to cause the closed contacts to open or the open contacts to close. The action of the circuit and mechanism is controlled by the change of the open and closed states of the switch contacts.
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