Rotary-brush mechanism assembly of road sweeper

The utility model discloses a rotary-brush mechanism assembly of a road sweeper. The rotary-brush mechanism assembly comprises pulley assemblies, a mounting frame assembly, bidirectional hydraulic cylinders, a single-output-rod hydraulic cylinder, rotary-brush assemblies and universal couplers. The mounting frame assembly is mounted on the pulley assemblies, and the bidirectional hydraulic cylinders, the single-output-rod hydraulic cylinder and the rotary-brush assemblies are mounted on the mounting frame assembly. A piston rod of the single-output-rod hydraulic cylinder is connected with a rotary-brush adjusting rod, and the other end of the rotary-brush adjusting rod is connected with the rotary-brush assemblies. One ends of the universal couplers are connected with the rotary-brush assemblies, and the other ends of the universal couplers are fixed on the mounting frame assembly. The rotary-brush mechanism assembly is excellent in functional performance, is stable in integral structure and remarkable in sweeping effect by the aid of combination of pulleys and a mounting frame, and sweeping blind areas are eliminated; the bidirectional hydraulic cylinders and the single-output-rod hydraulic cylinder enable the rotary-brush assemblies to withdraw into the sweeper as much as possible after resetting, and the sweeper is thereby downsized.