Abstract: The present invention discloses a tire tread pattern provided with an anti-stone structure. The tread pattern is composed of an annular groove that is continuous along the circumferential direction and a pattern block, the annular groove is defined by a discontinuous first chamfered edge, a first polygonal surface parallel to the tread is arranged at a portion in the annular groove that is concave relative to the first chamfered edge, a second chamfered edge and a third chamfered edge of the first polygonal surface separately extend along the groove bottom direction to form two second polygonal surfaces, the two second polygonal surfaces and the first polygonal surface share a vertex S; and a groove bottom vein of the annular groove is zigzag along the circumferential direction.

Abstract: The invention discloses an automobile active steering system with a cycloidal-pin wheel mechanism, and aims at overcoming the contraction between light steering effort and flexibility. The automobile active steering system comprises a steering hand wheel (47), a steering shaft (52), a steering transmission shaft (48), a cycloidal-pin wheel type transmission mechanism (49), a rotary hydraulic valve (50), and a steering box (51). The steering hand wheel (47) is connected with an upper end of the steering shaft (52) by use of a spline pair, a lower end of the steering shaft (52) is connected with an upper end of the steering transmission shaft (48) by use of a universal joint, a lower end of the steering transmission shaft (48) is connected with a right end of an input shaft (21) of the cycloidal-pin wheel type transmission mechanism (49) by use of a universal joint.

Abstract: The invention discloses an automobile active steering system with a cycloidal-pin wheel mechanism, and aims at overcoming the contraction between light steering effort and flexibility. The automobile active steering system comprises a steering hand wheel (47), a steering shaft (52), a steering transmission shaft (48), a cycloidal-pin wheel type transmission mechanism (49), a rotary hydraulic valve (50), and a steering box (51). The steering hand wheel (47) is connected with an upper end of the steering shaft (52) by use of a spline pair, a lower end of the steering shaft (52) is connected with an upper end of the steering transmission shaft (48) by use of a universal joint, a lower end of the steering transmission shaft (48) is connected with a right end of an input shaft (21) of the cycloidal-pin wheel type transmission mechanism (49) by use of a universal joint.