Steering knuckle for steering axle assembly of combine harvester

The utility model discloses a steering knuckle for a steering axle assembly of a combine harvester. The steering knuckle comprises a steering axle, a steering vertical shaft, a steering swing arm and a steering pin shaft, wherein the steering vertical shaft is perpendicularly fixed to the upper surface of one end of the steering axle, the steering swing arm is of a V-shaped structure, a mounting hole is formed in the center of the steering swing arm, the steering vertical shaft penetrates through the mounting hole, and the steering vertical shaft and the mounting hole are fixedly connected together; positioning holes are formed in the two ends of the steering swing arm; the lower part of the steering pin shaft is inserted into the positioning holes, and the steering pin shaft and the positioning holes are fixedly connected; a step is arranged on the outer wall of the lower end of the steering pin shaft, the upper end of the steering pin shaft penetrates through the positioning hole and then extends to the pos