The M1 and M3 motors in the main circuit of the gear hobbing machine tool use QF1 and QF2 circuit breakers as overload protection. The transformer and control circuit use QF3 and QF4 circuit breakers as overload protection, respectively.

safeguard:

a. Micro switches SQ2 and SQ3 are installed on the transmission cover and differential box door respectively as safety protection for opening the cover and stopping the car upon opening the door

b. The travel switch SQ1 serves as the ultimate safety protection for the vertical up and down movement of the tool holder

c. The gear hobbing machine tool selects grounding terminals as the connection point for repeated grounding to ensure the reliability of grounding protection