Front manual reset mechanism

The invention relates to a front-mounted manual reset mechanism which comprises a box body, a screw rod, a thrust sleeve, two clutch mechanisms and a rotary table rotationally arranged on the front portion of the box body, and the rotary table is provided with an inner ring matched with the thrust sleeve through an axial guide key and an outer ring exposed out of the box body and capable of being rotated by external force. By rotating the rotating disc in the designated direction, the rotating disc drives the thrust sleeve to rotate through a key, the thrust sleeve drives the thrust seat to rotate, the thrust seat drives the feed nut to rotate through end face teeth of the first clutch mechanism, the feed nut drives the lead screw to rotate, front-back movement of the brake head is achieved, and therefore manual reset of the brake mechanism can be achieved. According to the invention, the manual resetting mechanism is designed between the tread box body and the brake head for the first time, so that means res