Stop type steering shaft connecting device, steering mechanism and vehicle

The embodiment of the invention provides a stop type steering shaft connecting device, a steering mechanism and a vehicle, and relates to the field of rail transit equipment. The connecting device comprises a coupler, a blocking clamp and a blocking disc, hole cavities matched with an output shaft and a steering shaft of the steering motor are formed in the two ends of the coupler respectively, a lower column body of the coupler is located in a center hole cavity of the blocking disc, the portion, located in the blocking disc, of the column body is fixedly sleeved with the blocking clamp, and the blocking clamp is of an annular columnar structure provided with hole cavities. A hole cavity is formed in the blocking clamp, the hole cavity is connected with a lower column body of the coupler in a matched and sleeved mode, one side of the blocking clamp is cut and separated and fixed through a first fastening piece, a protruding block is arranged on the other side of the blocking clamp, a second ...