Tips for Using the Rear Wheel Steering System of Oil Tankers

First, the phase control system. Including stepping motor, fan control gear, swing arm, large bevel gear, small bevel gear, hydraulic control valve connecting rod and other components. Rear steering drive shaft and steering gear connection and input front steering rack The state of movement. A front and rear wheel angle ratio sensor is mounted on the rotary shaft of the sector control gear.

1. Stepping motor for oil tanker: It is fixed at one end of the housing by Bolts. The output shaft of the motor is equipped with a bevel gear, which meshes with another bevel gear fixed on the worm shaft. The rotation of the worm shaft will cause the sector control gear plate to swing. The electric motor receives the electric signal of the vehicle speed sensor and rotates. As a result of the rotation, the sector control gear plate swings positively or reversely by a certain angle, thereby pulling or pushing the swing arm away from the stepping motor.

2. Oil truck hydraulic control valve connecting rod: one end is connected with the swing arm, the middle passes through the hole on the big bevel gear, and the other end is connected with the active lever of the hydraulic control valve. The rotation of the big bevel gear is driven by the small bevel gear. The rotation of the small bevel gear is driven by the rear steering drive shaft. It can be seen that the movement of the hydraulic control valve connecting rod is a combination of the swing arm movement and the large bevel gear movement, that is, the movement of the hydraulic control valve connecting rod is affected by the vehicle speed. The comprehensive effect of the front steering movement.

Second, the oil tanker hydraulic control valve. It is a spool valve structure, the position of the spool valve depends on the speed and front wheel steering angle.

Third, the oil tanker rear steering power cylinder. The valve sleeve seals the slide valve. The valve sleeve contains the oil passage connecting the phase control system and the power cylinder. The output rod passes through the power cylinder piston (the output rod is fixedly connected with the piston of the power cylinder. The two ends are respectively connected with the left and right steering tie rods, and under the pressure difference between the two chambers of the power cylinder, the output rod moves to the left or right, so that the rear wheels are deflected accordingly. When the automobile is driving straight, two cylinders are in the power cylinder. The return spring force of the cavity and the hydraulic pressure make the rear wheel in a straight driving position. This function also makes the rear wheel return to the direct driving position when the electronic control system or the hydraulic circuit fails, making the four-wheel steering become general Two-wheel steering work state.

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