Abstract: A floor surface cleaning machine includes a suction mechanism disposed at a bottom side of a machine frame for suction of dust and dirt on the floor surface, a brush mechanism disposed at the bottom side of the machine frame rearwardly of the suction mechanism for brushing the floor surface with cleaning liquid, and a squeegee unit disposed at the bottom side of the machine frame rearwardly of the brush mechanism for gathering dirty liquid. Before brushing the floor surface, fibers may be removed from the floor surface together with the dust and dirt for preventing the fibers from being tangled up with bristles of the brush mechanism.

Abstract: A floor surface cleaning machine includes a suction mechanism disposed at a bottom side of a machine frame for suction of dust and dirt on the floor surface, a brush mechanism disposed at the bottom side of the machine frame rearwardly of the suction mechanism for brushing the floor surface with cleaning liquid, and a squeegee unit disposed at the bottom side of the machine frame rearwardly of the brush mechanism for gathering dirty liquid. Before brushing the floor surface, fibers may be removed from the floor surface together with the dust and dirt for preventing the fibers from being tangled up with bristles of the brush mechanism.

Abstract: A self-propelled cleaning device includes a chassis with a protrusion, such that a side brush mechanism is proximate to the external periphery of the contour of the chassis, and an elastic element installed between a driving wheel set and the chassis for providing buffer and shock absorption. An interval is formed between the front edge of the chassis and a dust inlet for guiding dust into a dust collecting case in a chassis containing groove, and the containing groove has a first spacer apart from a control unit and a second spacer separating a carrying space from a negative pressure device. The second spacer has a passage interconnecting the containing groove and the carrying space, and the dust collecting case has separated first and second sides.