An identical steer control mechanism of a radial bar-link trapezoidal swing arm mounted in the middle of a front end of a vehicle body without steering function in a rear wheel of the vehicle, comprising:
- a radius bar, one end of the radius bar is fixed to the bottom of a steering wheel column, wherein the steering angle of the steering wheel is α, the length of the radius bar is R;
- the rotation of the steering wheel is configured to drive the radius bar to generate a sine sin α and a cosine cos α, meanwhile the sine sin α and the cosine cos α are configured to follow the rotation of the steer wheel;
- a trapezoidal swing arm, one end of the trapezoidal swing arm is fixed perpendicularly to the other end of the radius bar, wherein a fixed pendulum shaft is formed at the fixed point of the trapezoidal swing arm and the radius bar;
- the length of the trapezoidal swing arm is R*M/Hi, and the trapezoidal swing arm is configured to deflect along with the angle of the steering wheel α, and simultaneously generates a longitudinal cosine compensation effect (R*N/Hi)*sin α and a longitudinal displacement of R*cos α±(R*M/HI)*sin α;
- a sinusoidal connecting rod, the sinusoidal connecting rod is configured as a horizontal rod arranged in a horizontal direction and has two sleeves, wherein the fixed pendulum shaft is configured to insert into a first sleeve, and the sinusoidal connecting rod is vertically positioned between the radius rod and the trapezoidal swinging arm so as to follow the fixed swinging shaft;
- a driven radius bar, wherein one end of the driven radius bar is configured to hinge in a second sleeve, while the other end is configured to hinge to a frame, and the driven radius bar is parallel to the radius bar and has the same length, and in combination with the sinusoidal connecting rod and the radius bar, a parallel four-bar linkage mechanism is formed;
- a two-dimensional composite control transmission arm, wherein a cross-shaped groove is arranged on the two-dimension composite control transmission arm, and a transverse groove of the cross-shaped groove is parallel to half-shafts on both sides, while a vertical groove of the cross-shaped groove is parallel to the longitudinal direction of the vehicle body;
- and a connecting arm is extended on one side of the transverse groove;
- a vector control swing arm, a sliding slot is arranged on the vector control swing arm, and the initial position of the setting direction of the sliding slot is parallel to the arrangement direction of the radius bar;
- a plurality of sliders, a first slider is configured to fix on one end of the sinusoidal connecting rod and slidable in the vertical groove to form horizontal sinusoidal displacement R*sin α of the two-dimensional composite control transmission arm;
- a second slider is configured to hinge to the other end of the trapezoidal swing arm and slidable in the transverse groove to make the longitudinal displacement of the two-dimensional composite control transmission arm equal R*cos α±(R*M/Hi)*sin α constantly, thus controlling the two-dimensional composite control transmission arm to move up and down, left and right vertically and horizontally;
- a third slider is configured to hinge with one end of the connecting arm to form a critical control point (Gi) and slidable in the sliding slot;
- an auxiliary steering shaft or a solid steering shaft is connected to the sliding slot, and the third slider is configured to drive the sliding slot to rotate around the auxiliary steering shaft, making the auxiliary steering shaft generate a steering angle βi, then the solid steering shaft is configured to connect with a synchronous gear shaft, or a parallel connecting rod, or a crankshaft double-connecting rod;
- or the solid steering shaft is directly connected and controlled by the vector control swing arm, and the third slider is configured to drive the sliding slot to rotate around the solid steering shaft to generate the steering angle βi, then the solid steering shaft is configured to connect to a hub half shaft axially and vertically to make R*cos βi=R*cos α±R*M/H*sin α.