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 a vehicle, comprising:
- a radius bar, a first end of the radius bar is fixed to the bottom of a steering wheel column, wherein a steering angle of a steering wheel is α, a length of the radius bar is R;
- the steering wheel rotates to drive the radius bar to generate a sine sin α and a cosine cos α;
- the sine sin α and the cosine cos α are configured to follow rotation of the steering wheel;
- a first trapezoidal swing are, one end of the first trapezoidal swing arm is perpendicularly fixed to a second end of the radius bar, wherein a fixed pendulum shaft is formed at a fixed point of the first trapezoidal swing arm and the radius bar;
- a length of the first trapezoidal swing arm is R*M/Hi, M represents a distance between steering axles of two front wheels of a vehicle body:
- Hi represents a distance from any steering axle to a steering center point of a frame;
- and the first trapezoidal swing arm is configured to deflect along with the steering angle of the steering wheel α, and simultaneously generates a longitudinal cosine compensation effect of (R*M/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 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, so the sinusoidal connecting rod is vertically positioned between the radius rod and the first trapezoidal swing arm so as to move along with the fixed pendulum shaft;
- a driven radius bar, wherein a first end of the driven radius bar is configured to hinge in a second sleeve, a second end of the driven radius bar is configured to hinge to the frame;
- the driven radius bar is parallel to the radius bar and has a same length;
- the driven radius bar, the sinusoidal connecting rod, the frame, and the radius bar form a parallel four-bar linkage mechanism;
- a first two-dimensional composite control transmission arm, wherein a cross-shaped groove is arranged on the first two-dimensional composite control transmission arm;
- 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 first vector control swing arm, a sliding slot is arranged on the first vector control swing arm;
- an initial position of a setting direction of the sliding slot is parallel to an arrangement direction of the radius bar;
- a first set of sliders, a first slider of the first set of sliders is configured to fix on one end of the sinusoidal connecting rod and is slidable in the vertical groove to form a horizontal sinusoidal displacement R*sin α of the first two-dimensional composite control transmission arm;
- a second slider of the first set of sliders is configured to hinge to the second end of the first trapezoidal swing arm and is slidable in the transverse groove, so a longitudinal displacement of the first two-dimensional composite control transmission arm is equal to R*cos α±(R*M/Hi)*sin α;
- thus controlling the first two-dimensional composite control transmission arm to move up and down, left and right vertically and horizontally;
- a third slider of the first set of sliders is configured to hinge with one end of the connecting arm to form a critical control point GI and is slidable in the sliding slot;
- and
- an auxiliary steering shaft or a solid steering shaft is connected to the sliding slot, when the auxiliary steering shaft is connected to the sliding slot, the third slider of the first set of sliders 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 auxiliary steering shaft is connect with a parallel connecting rod by the solid steering shaft;
- when the solid steering shaft is connected to the sliding slot, the solid steering shaft is directly connected and controlled by the first vector control swing arm, and the first third slider drives 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.