The present invention relates to a floor grinding apparatus (100) with a housing (110) having an interior space (111) open to one side, a carrier plate (120) rotatably mounted in the interior space (111) for receiving abrasives, and drive unit (130) adapted to rotate the carrier plate (120), the housing (110) having an inner dust sealing ring (112) with at least one recess (115), wherein the inner dust sealing ring (112) divides the interior space (111) into an inner portion (113) and an outer portion (114), and wherein the carrier plate (120) is disposed in the inner portion (114), at least one extraction opening (116) disposed in the outer portion (114), and an outer dust sealing ring (117) enclosing the interior space (111), the inner dust sealing ring (112) and the outer dust sealing ring (117) being arranged to define a common working plane parallel to the plane of rotation of the carrier plate (120).

A floor polishing or grinding pad assembly is provided. In one aspect, a polishing or grinding pad assembly employs a fibrous pad, a reinforcement layer or ring, and multiple floor-contacting disks. In another aspect, the reinforcement layer includes a central hole through which the fibrous pad is accessible and the fibrous pad at the hole has a linear dimension (x) greater than a linear dimension (y) of one side of the adjacent reinforcement layer. In yet another aspect, at least one of the floor-contacting disks has an angle () offset from that of a base surface of the disk, the fibrous pad and/or the reinforcement layer. A further aspect employs a smaller set of disks alternating between and/or offset from a larger set of the disks. In another aspect, the reinforcement layer includes a wavy or undulating internal edge shape.

A floor polishing or grinding pad assembly is provided. In one aspect, a polishing or grinding pad assembly employs a fibrous pad, a reinforcement layer or ring, and multiple floor-contacting disks. In another aspect, the reinforcement layer includes a central hole through which the fibrous pad is accessible and the fibrous pad at the hole has a linear dimension (x) greater than a linear dimension (y) of one side of the adjacent reinforcement layer. In yet another aspect, at least one of the floor-contacting disks has an angle () offset from that of a base surface of the disk, the fibrous pad and/or the reinforcement layer. A further aspect employs a smaller set of disks alternating between and/or offset from a larger set of the disks. In another aspect, the reinforcement layer includes a wavy or undulating internal edge shape.

A cleaning robot includes a cleaning element, which is configured to be in contact with a surface to be cleaned and form a chamber with the surface to be cleaned; a suction module; a driving module, which is connected with the cleaning element and drives the cleaning element to rotate with the axis perpendicular to the surface to be cleaned as the rotation axis; a controller, which is coupled to and controls the suction module and the driving module; and a bridge, which connects a plurality of cleaning elements and the driving module, wherein at least one of the cleaning elements is configured to be able to deflect with respect to the bridge, so as to enable the rotation axis corresponding to the cleaning element to be staggered with the rotation axes corresponding to other cleaning elements to form an included angle.

An apparatus is provided for the attachment of brushes to the drive system of rotary floor scrubbing machines. In one embodiment, the apparatus provides for a scrubbing plate assembly suitable for attachment to the drive system of a rotary floor scrubbing machine. The scrubbing plate assembly has a scrubbing plate and an adapter plate. When the adapter plate is aligned and in contact with a scrubbing plate, the adapter plate locks to the scrubbing plate by axial movement of said adapter plate relative to said scrubbing plate.

An apparatus is provided for the attachment of brushes to the drive system of rotary floor scrubbing machines. In one embodiment, the apparatus provides for a scrubbing plate assembly suitable for attachment to the drive system of a rotary floor scrubbing machine. The scrubbing plate assembly has a scrubbing plate and an adapter plate. When the adapter plate is aligned and in contact with a scrubbing plate, the adapter plate locks to the scrubbing plate by axial movement of said adapter plate relative to said scrubbing plate.

A cleaning fabric assembly used for an automatic cleaning machine includes an outer unit, a water absorbent unit, an assembly unit and a fixing unit. A plurality of openable portions, which extend from the peripheral portion of the outer unit to the center of the outer unit, are provided on top of the outer unit. The water absorbent unit and assembly unit and may inserted into the outer unit through the cracks between the openable portions. The cleaning fabric assembly of the present invention may be used to remove water stains with its water absorbent unit or by mopping the floor. Also, to uninstall the outer unit or the water absorbent unit for replacement or cleaning, a user simply has to rotate the fixing unit to disengage the male engagement pieces from the engagement portions.

A cleaning fabric assembly used for an automatic cleaning machine includes an outer unit, a water absorbent unit, an assembly unit and a fixing unit. A plurality of openable portions, which extend from the peripheral portion of the outer unit to the center of the outer unit, are provided on top of the outer unit. The water absorbent unit and assembly unit and may inserted into the outer unit through the cracks between the openable portions. The cleaning fabric assembly of the present invention may be used to remove water stains with its water absorbent unit or by mopping the floor. Also, to uninstall the outer unit or the water absorbent unit for replacement or cleaning, a user simply has to rotate the fixing unit to disengage the male engagement pieces from the engagement portions.

A floor polishing or grinding pad assembly is provided. In one aspects a polishing or grinding pad assembly employs a flexible pad, a reinforcement layer or ring, and multiple floor-contacting tools such as disks. In yet another aspect, at least one of the floor-contacting tools has a workpiece-contacting bottom plane having angle offset from that of a base surface of the tool, a flexible pad and/or a flexible reinforcement layer. A further aspect employs a smaller set of disks alternating between and/or offset from a larger set of the disks.

A floor polishing or grinding pad assembly is provided. In one aspects a polishing or grinding pad assembly employs a flexible pad, a reinforcement layer or ring, and multiple floor-contacting tools such as disks. In yet another aspect, at least one of the floor-contacting tools has a workpiece-contacting bottom plane having angle offset from that of a base surface of the tool, a flexible pad and/or a flexible reinforcement layer. A further aspect employs a smaller set of disks alternating between and/or offset from a larger set of the disks.