Disclosed herein are a wheel assembly and a robot cleaner including a main body and a wheel assembly coupled to the main body to guide movement of the main body. The wheel assembly has a rotation arm including a first end portion rotatably mounted on the main body, a drive wheel rotatably installed on a second end portion of the rotation arm opposite the first end portion, and an elastic member including a first end installed at the main body and a second end vertically moveably installed at the rotation arm opposite the first end, such that a reduction degree of a contact force due to a descent of the drive wheel.

Disclosed herein are a wheel assembly and a robot cleaner including a main body and a wheel assembly coupled to the main body to guide movement of the main body. The wheel assembly has a rotation arm including a first end portion rotatably mounted on the main body, a drive wheel rotatably installed on a second end portion of the rotation arm opposite the first end portion, and an elastic member including a first end installed at the main body and a second end vertically moveably installed at the rotation arm opposite the first end, such that a reduction degree of a contact force due to a descent of the drive wheel.

A cleaning machine may include: a first brush comprising a first brush shaft extending in a left-right direction and a first brush body held by the first brush shaft; a second brush comprising a second brush shaft extending in the left-right direction and a second brush body held on the second brush shaft; a brush supporting member supporting each of the first brush and the second brush such that the first brush and the second brush are rotatable; a body supporting the brush supporting member such that the brush supporting member is pivotable; and a pivot mechanism configured to pivot the brush supporting member with respect to the body. At least the first brush may move with respect to the body in an up-down direction when the brush supporting member pivots with respect to the body.

A cleaning machine may include: a first brush comprising a first brush shaft extending in a left-right direction and a first brush body held by the first brush shaft; a second brush comprising a second brush shaft extending in the left-right direction and a second brush body held on the second brush shaft; a brush supporting member supporting each of the first brush and the second brush such that the first brush and the second brush are rotatable; a body supporting the brush supporting member such that the brush supporting member is pivotable; and a pivot mechanism configured to pivot the brush supporting member with respect to the body. At least the first brush may move with respect to the body in an up-down direction when the brush supporting member pivots with respect to the body.

A cleaning device includes a rolling brush mounted on a housing and can be in rolling contact with the ground. A waste collection region is integrally or separately provided in the housing, and the waste collection region is provided with a collection inlet provided corresponding to the rolling brush. Waste brought up by the rolling contact is collected into the waste collection region under the rotation action of the rolling brush. The housing is provided with one or more scraping guiders connected to the collection inlet, and each of the scraping guiders is in flexible pressure contact with the rolling brush or the ground, and is configured to scrape off residual waste absorbed by the rolling brush or residual waste on the ground and transfer the residual waste into the waste collection region.

A cleaning device includes a rolling brush mounted on a housing and can be in rolling contact with the ground. A waste collection region is integrally or separately provided in the housing, and the waste collection region is provided with a collection inlet provided corresponding to the rolling brush. Waste brought up by the rolling contact is collected into the waste collection region under the rotation action of the rolling brush. The housing is provided with one or more scraping guiders connected to the collection inlet, and each of the scraping guiders is in flexible pressure contact with the rolling brush or the ground, and is configured to scrape off residual waste absorbed by the rolling brush or residual waste on the ground and transfer the residual waste into the waste collection region.

An extraction interface for connecting a first flow channel to a second flow channel in an airtight manner has a main body with an extraction opening. The extraction opening has an opening plane and a sealing element that surrounds the extraction opening in the circumferential direction. In order to improve a sealing effect of the sealing element, the sealing element is an elastic bellows, which when viewed in a cross section oriented orthogonal to the opening plane has in a relaxed state of the sealing element an E-shape with at least one bending point, two legs that meet in the bending point and two leg end regions adjoining the legs. The leg end regions point radially outward in a direction facing away from the extraction opening and are connected to two locally separated connecting points of the main body.

An extraction interface for connecting a first flow channel to a second flow channel in an airtight manner has a main body with an extraction opening. The extraction opening has an opening plane and a sealing element that surrounds the extraction opening in the circumferential direction. In order to improve a sealing effect of the sealing element, the sealing element is an elastic bellows, which when viewed in a cross section oriented orthogonal to the opening plane has in a relaxed state of the sealing element an E-shape with at least one bending point, two legs that meet in the bending point and two leg end regions adjoining the legs. The leg end regions point radially outward in a direction facing away from the extraction opening and are connected to two locally separated connecting points of the main body.

The present application discloses a cleaning device and its dust box. The cleaning device may comprise a body, a dust box, and at least two fans. The dust box may be provided for connection to the body, the at least two fans are provided in the body for forming an airflow into and out of the dust box through the apparatus body. The dust box may be provided such that the airflow formed by each of the at least two fans can flow out of the dust box in different directions.

The present application discloses a cleaning device and its dust box. The cleaning device may comprise a body, a dust box, and at least two fans. The dust box may be provided for connection to the body, the at least two fans are provided in the body for forming an airflow into and out of the dust box through the apparatus body. The dust box may be provided such that the airflow formed by each of the at least two fans can flow out of the dust box in different directions.