# US 2025/0082162 A1 · Automatic cleaning device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0082162 A1 - Document ID: US20250082162A1 - Status: Published application - Kind: A1 - Application number: 18/728,233 - Filed: 2022-08-08 - Published: 2025-03-13 - Earliest claimed: 2022-01-11 - Assignees: Beijing Roborock Technology Co., Ltd. - Applicants: Beijing Roborock Technology Co., Ltd. - Inventors: Haibin LI; Zhibin ZHANG; Yanhui LIU; Hongliang XU - Web page: https://patentgrep.com/patent/US20250082162A1 ## CPC - A47L 11/4002: {Installations of electric equipment} - A47L 9/28: Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means - A47L 9/2889: {Safety or protection devices or systems, e.g. for prevention of motor over-heating or for protection of the user} - A47L 11/24: Floor-sweeping machines, motor-driven - A47L 11/4011: {Regulation of the cleaning machine by electric means; Control systems and remote control systems therefor} - A47L 11/4061: {Steering means; Means for avoiding obstacles; Details related to the place where the driver is accommodated} - G01S 7/4817: {relating to scanning} - G01S 17/931: of land vehicles - A47L 2201/04: Automatic control of the travelling movement; Automatic obstacle detection - 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) - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES ## Abstract An automatic cleaning device, including an assembly structure configured to assemble a position determination device on a mobile platform T the assembly structure includes an assembly bracket including: a rotor accommodation portion that includes a first arc-shaped side wall; and a motor accommodation portion that includes a second arc-shaped side wall. The position determination device includes a position determination element including: a rotor, a rotating shaft of the rotor being substantially disposed in a geometric center of the rotor accommodation portion; and a motor, an output shaft of the motor being substantially disposed on a connecting line between a geometric center of the motor accommodation portion and the geometric center of the rotor accommodation portion. ## Claims ### Claim 1 An automatic cleaning device, comprising: a mobile platform, a position determination device, and an assembly structure configured to assemble the position determination device on the mobile platform, wherein: the assembly structure comprises an assembly bracket comprising: a rotor accommodation portion comprising a first arc-shaped side wall; and a motor accommodation portion comprising a second arc-shaped side wall, wherein the first arc-shaped side wall of the rotor accommodation portion is in smooth connection with the second arc-shaped side wall of the motor accommodation portion; and an area of an opening formed by the first arc-shaped side wall is greater than an area of an opening formed by the second arc-shaped side wall; and the position determination device comprises a position determination element comprising: a rotor, wherein a rotating shaft of the rotor is substantially disposed in a geometric center of the rotor accommodation portion, and is configured to transmit and/or receive a detection signal during continuous rotation; and a motor, wherein an output shaft of the motor is substantially disposed on a connecting line between a geometric center of the motor accommodation portion and the geometric center of the rotor accommodation portion and located between the geometric center of the motor accommodation portion and the geometric center of the rotor accommodation portion, and the motor is configured to connect to the rotor through a power transmission structure to provide a driving force for the rotor. ### Claim 2 (depends on 1) The automatic cleaning device according to claim 1, wherein the motor accommodation portion further comprises: a first opening; in a bottom surface of the motor accommodation portion, configured to accommodate the motor; and a first supporting rib extending inwards along an inner side of a side wall of the motor accommodation portion to an edge of the first opening, wherein a geometric center of the first opening is closer to the geometric center of the rotor accommodation portion than the geometric center of the motor accommodation portion. ### Claim 3 (depends on 2) The automatic cleaning device according to claim 2, wherein the rotor accommodation portion further comprises: a second opening, in a bottom surface of the rotor accommodation portion, configured to accommodate the rotor; and a second supporting rib extending inwards along an inner side of a side wall of the rotor accommodation portion to an edge of the second opening, wherein a geometric center of the second opening is equivalent to the geometric center of the rotor accommodation portion. ### Claim 4 (depends on 3) The automatic cleaning device according to claim 3, wherein the second opening is communicated with the first opening; and an area of the second opening is greater than an area of the first opening. ### Claim 5 (depends on 1) The automatic cleaning device according to claim 1, wherein the position determination device further comprises: a hood covering a top of the rotor and comprising a circular top surface, a bottom circular ring, and a plurality of connectors connecting the circular top surface with the bottom circular ring, wherein the bottom circular ring is fixedly connected to a top surface of the automatic cleaning device; and a first gap is formed between the bottom circular ring and an outer peripheral surface of the rotor. ### Claim 6 (depends on 5) The automatic cleaning device according to claim 5, wherein the assembly structure further comprises: a circular shielding piece attached to an inner side of the bottom circular ring, wherein a second gap is formed between the circular shielding piece and the outer peripheral surface of the rotor; and the second gap is smaller than the first gap. ### Claim 7 (depends on 6) The automatic cleaning device according to claim 6, wherein the circular shielding piece has a width extending in a radial direction and a height extending in an axial direction; and the width of the circular shielding piece is greater than the height of the circular shielding piece. ### Claim 8 (depends on 6) The automatic cleaning device according to claim 6, wherein the circular shielding piece comprises a connector clip fitting the connector; and after the connector clip is clipped into the connector, the circular shielding piece is attached to the inner side of the bottom circular ring. ### Claim 9 (depends on 8) The automatic cleaning device according to claim 8, wherein an inner wall of the connector comprises a first slot; an outer wall of the connector clip comprises a projection beam fitting the first slot; and after the projection beam is inserted into the first slot, the circular shielding piece is attached to the inner side of the bottom circular ring. ### Claim 10 (depends on 9) The automatic cleaning device according to claim 9, wherein the bottom circular ring comprises a second slot extending in a circumferential direction of a bottom surface of the bottom circular ring, and a third slot in an inner surface of the bottom circular ring, wherein the second slot is communicated with the third slot; and the circular shielding piece comprises a T-shaped protrusion protruding outwards from an outer wall of the circular shielding piece, wherein after the T-shaped protrusion is inserted into the third slot, the circular shielding piece is attached to the inner side of the bottom circular ring. ### Claim 11 (depends on 10) The automatic cleaning device according to claim 10, wherein the third slot is disposed below the connector; and the T-shaped protrusion is disposed below the connector clip. ### Claim 12 (depends on 11) The automatic cleaning device according to claim 11, wherein the bottom circular ring further comprises limiting grooves formed in the inner surface of the bottom circular ring, wherein the limiting grooves are symmetrically formed on two sides of the third slot; and the circular shielding piece further comprises limiting protrusions on two sides of the T-shaped protrusion; and when the circular shielding piece is attached to the inner side of the bottom circular ring, the limiting protrusions are fitted with the limiting grooves. ### Claim 13 (depends on 1) The automatic cleaning device according to claim 1, wherein the position determination device is a laser distance sensor; the position determination element is a laser distance measurement element; and the detection signal is a laser signal.