Travel limit mechanism based on reset spring

A travel limit mechanism based on a reset spring comprises a shift fork, a check block on a rotating component, and a limit device limiting rotating angles of the shift fork. The check block on the rotating component can push the shift fork to rotate, and the shift fork is arranged in the axial direction of a rotating shaft of the rotating component. The travel limit mechanism further comprises the reset spring. The shift fork comprises a shift fork body and a shift fork rotating shaft, the shift fork body comprises two ends located on two sides of the shift fork rotating shaft, one of the two ends can be pushed by the check block on the rotating component to enable the shift fork to rotate, and the other one of the two ends is connected with the reset spring. When the shift fork cannot be pushed or blocked by the check block on the rotating component, the reset spring pulls the shift fork to reset. A part system of the travel limit mechanism is arranged in the axial direction of the rotating shaft of the rot