# US 12,758,071 B2 · Self-cleaning floor scrubbing machines > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,758,071 B2 - Document ID: US12758071B2 - Status: Granted - Kind: B2 - Application number: 18/692,061 - Filed: 2022-04-15 - Published: 2025-01-16 - Granted: 2026-10-13 - Earliest claimed: 2021-04-16 - Assignees: Suzhou Bob-Home Intelligent Technology Co., Ltd. - Applicants: Suzhou Xinqingsong Intelligent Technology Co., Ltd. - Inventors: Xiaosong Wang; Linling Qin - Web page: https://patentgrep.com/patent/US12758071B2 ## CPC - A47L 11/292: having rotary tools (A47L11/30 takes precedence) - A47L 11/30: by suction - A47L 11/4013: {Contaminants collecting devices, i.e. hoppers, tanks or the like} - A47L: DOMESTIC WASHING OR CLEANING (brushes A46B; cleaning quantities of bottles or of other hollow articles of one kind B08B9/00; laundry D06F); SUCTION CLEANERS IN GENERAL (cleaning in general B08) ## Abstract A self-cleaning floor scrubbing machine is disclosed in the present invention. The self-cleaning floor scrubbing machine comprises a roller brush, a dirt holding tank, a threaded water pumping and conveying rod, and a water blocking cover. A length direction of the dirt holding tank is the same as an axial direction of the roller brush. The dirt holding tank is located on one side of the roller brush. An opening is provided on a side of the dirt holding tank facing the roller brush. An axial direction of the threaded water pumping and conveying rod is the same as that of the roller brush. The threaded water pumping and conveying rod is mounted in the dirt holding tank. A drain outlet is disposed on the dirt holding tank. The water blocking cover is arranged above the roller brush. One end of the water blocking cover extends to the dirt holding tank. ## Claims ### Claim 1 A self-cleaning floor scrubbing machine, comprising: a roller brush; a dirt holding tank located on one side of the roller brush and being provided with an opening on a side of the dirt holding tank facing the roller brush and at least one drain outlet, wherein a length direction of the dirt holding tank is the same as an axial direction of the roller brush; a threaded water pumping and conveying rod rotatably mounted in the dirt holding tank, wherein an axial direction of the threaded water pumping and conveying rod is the same as that of the roller brush; and a water blocking cover arranged above the roller brush, wherein one end of the water blocking cover extends to the dirt holding tank. ### Claim 2 (depends on 1) The self-cleaning floor scrubbing machine according to claim 1, further comprising: a pressure roller located above the dirt holding tank and configured to press one side of the roller brush, wherein an axial direction of the pressure roller is the same as that of the roller brush; and/or a plurality of first protrusion structures and/or a plurality of first hairbrush structures arranged on one side of the roller brush and configured to abut against the roller brush. ### Claim 3 (depends on 2) The self-cleaning floor scrubbing machine according to claim 2, wherein the first protrusion structures and/or the first hairbrush structures are arranged at an upper edge of the opening of the dirt holding tank. ### Claim 4 (depends on 2) The self-cleaning floor scrubbing machine according to claim 2, further comprising: a scrubbing roller shaft arranged on one side of the roller brush, wherein an axial direction of the scrubbing roller shaft is the same as that of the roller brush, and the first protrusion structures and/or the first hairbrush structures are arranged on the scrubbing roller shaft. ### Claim 5 (depends on 4) The self-cleaning floor scrubbing machine according to claim 4, wherein the scrubbing roller shaft is located below the pressure roller. ### Claim 6 (depends on 5) The self-cleaning floor scrubbing machine according to claim 5, wherein the scrubbing roller shaft is in a hollow tubular shape, the scrubbing roller shaft is provided with a plurality of water holes and at least one water inlet, and the water holes and the at least one water inlet are respectively communicated with an inner cavity of the scrubbing roller shaft. ### Claim 7 (depends on 5) The self-cleaning floor scrubbing machine according to claim 5, wherein a scrubbing housing is sleeved over the scrubbing roller shaft; the scrubbing roller shaft is configured to rotate in the scrubbing housing; the first protrusion structures and/or the first hairbrush structures on the scrubbing roller shaft are spirally arranged; an opening is provided on a side of the scrubbing housing facing the roller brush; the scrubbing housing is provided with at least one water inlet; and the least one water inlet is communicated with an inner cavity of the scrubbing housing. ### Claim 8 (depends on 2) The self-cleaning floor scrubbing machine according to claim 2, wherein a threaded groove is formed in a surface of the pressure roller. ### Claim 9 (depends on 8) The self-cleaning floor scrubbing machine according to claim 8, wherein a pressure roller housing is sleeved over the pressure roller; the pressure roller is configured to rotate in the pressure roller housing; an opening is provided on a side of the pressure roller housing facing the roller brush; the pressure roller housing is provided with at least one water inlet and at least one water outlet; and the at least one water outlet is communicated with an inner cavity of the pressure roller housing and an inner cavity of the dirt holding tank. ### Claim 10 (depends on 2) The self-cleaning floor scrubbing machine according to claim 2, wherein a pressing degree of tightness between the pressure roller and the roller brush is adjustable. ### Claim 11 (depends on 1) The self-cleaning floor scrubbing machine according to claim 1, wherein the threaded water pumping and conveying rod presses one side of the roller brush. ### Claim 12 (depends on 1) The self-cleaning floor scrubbing machine according to claim 1, wherein the dirt holding tank is provided with at least one water inlet; a guide structure extends from a lower edge of the opening of the dirt holding tank, and an extended end of the guide structure inclines downwards; the drain outlet of the dirt holding tank is connectable to a suction machine; the threaded water pumping and conveying rod is provided with a plurality of second protrusion structures and/or a plurality of second hairbrush structures; and the threaded water pumping and conveying rod is a shaftless helical rod. ### Claim 13 (depends on 2) The self-cleaning floor scrubbing machine according to claim 2, further comprising: a scraping brush located on one side of the pressure roller in a rotating direction of the roller brush, wherein an axial direction of the scraping brush is the same as that of the roller brush, and the scraping brush presses one side of the roller brush. ### Claim 14 (depends on 1) The self-cleaning floor scrubbing machine according to claim 1, further comprising: a driving machine configured to drive the roller brush to rotate. ### Claim 15 (depends on 14) The self-cleaning floor scrubbing machine according to claim 14, further comprising: an electricity storage machine being electrically connected to the driving machine.