Double support steering controller

The utility model discloses a double support steering controlling valve which is composed of an input shaft, two needle roller bearings, a shaft seal, a screw shaft, a torsion rod and a pin, wherein the torsion rod is a thin and long shaft which is arranged in an inner hole of the input shaft; a thick diameter section of the right end of the torsion rod is matched with an inner hole at the right end of the input shaft, is flushed to a right end surface, and is fixedly connected with the pin; three annular slots are arranged on a left end shaft of the input shaft; each needle roller bearing is respectively arranged on the left and the right annular slots; the shaft seal is arranged between the two needle roller bearings nearby the right side; the screw shaft is a hollow shaft; a hole of the screw shaft facing to the right side and the two needle roller bearings arranged on the left end shaft of the input shaft are in gap fit. The utility model is provided with the two needle roller bearings which are separated from certain distance on the left end shaft of the input shaft. The utility model has the advantages of stable structural support and accurate position; external force has no influence on the rotation of the screw shaft corresponding to the input shaft. The utility model is especially suitable for a steering controlling valve of a heavy-duty car.