The rack and pinion steering gear outputted at both ends, the steering gear shaft as the transmission auxiliary member is mounted in the steering gear housing through the bearing, and the upper end is connected to the universal joint fork and the steering shaft through the spline. The steering rack meshing with the steering gear is horizontally arranged, and both ends are connected to the steering tie rod through the ball seat. The spring presses the rack against the gear through the pressure block to ensure no gap engagement. The preload of the spring can be adjusted with the adjustment screw. When the steering wheel is rotated, the steering gear rotates to move the rack meshing with it in the axial direction, so that the left and right tie rods drive the steering knuckle to rotate left and right to deflect the steering wheel, thereby realizing steering of the vehicle. The gear-and-pinion steering gear with intermediate output is shown in the figure. Its structure and working principle are basically the same as those of the rack-and-pinion steering gear output at both ends. The difference is that it is bolted to the left and right in the middle of the steering rack. The tie rods are connected. One end of the rack on the single-end output rack and pinion steering gear is connected to the tie rod through the inner and outer brackets.