Cleaning apparatus

1 . A cleaning device, comprising:

a controller configured to control a rotating motor to rotate; and

at least one cleaning apparatus, comprising a brush disc, an engagement mechanism and a transmission portion connected with the rotating motor, wherein the rotating motor drives the transmission portion to rotate in a first direction relative to the brush disc, such that the brush disc is engaged with the transmission portion through the engagement mechanism; the rotating motor drives the transmission portion to rotate in a second direction opposite to the first direction relative to the brush disc, such that the engagement mechanism is disengaged from the transmission portion; and the first direction is a rotating direction of the transmission portion in a normal working state, the second direction is a rotating direction of the rotating motor during a disengagement process.

2 . The cleaning device according to claim 1 , wherein the cleaning device further comprises a lifting and lowering mechanism, wherein the lifting and lowering mechanism is used for driving the transmission portion to lift or lower; and the lifting and lowering mechanism and the rotating motor cooperate with each other to realize engagement or disengagement of the engagement mechanism and the transmission portion.

3 . The cleaning device according to claim 2 , wherein the rotating motor drives the transmission portion to rotate in the first direction in a process of the lifting and lowering mechanism driving the transmission portion to lower, and after the lifting and lowering mechanism drives the transmission portion to lower in place, the rotating motor drives the transmission portion to rotate in the first direction relative to the brush disc with a first maximum stroke, such that the engagement mechanism is engaged with the transmission portion; the first maximum stroke is a rotation stroke that the rotating motor rotates in the first direction to engage the engagement mechanism with the transmission portion;

or after the lifting and lowering mechanism drives the transmission portion to lower in place, the rotating motor drives the transmission portion to rotate in the first direction relative to the brush disc with a first maximum stroke, such that the engagement mechanism is engaged with the transmission portion.

4 . The cleaning device according to claim 2 , wherein the rotating motor drives the transmission portion to rotate in the second direction in a process of the lifting and lowering mechanism driving the transmission portion to lower, and after the lifting and lowering mechanism drives the transmission portion to lower in place, the rotating motor drives the transmission portion to rotate in the second direction relative to the brush disc with a second maximum stroke, such that the engagement mechanism is disengaged from the transmission portion; the second maximum stroke is a rotation stroke that the rotating motor rotates in the second direction to disengage the engagement mechanism from the transmission portion;

or after the lifting and lowering mechanism drives the transmission portion to lower in place, the rotating motor drives the transmission portion to rotate in the second direction relative to the brush disc with a second maximum stroke, such that the engagement mechanism is disengaged from the transmission portion.

5 . The cleaning device according to claim 2 , wherein after the lifting and lowering mechanism drives the transmission portion to lower in place, the rotating motor drives the transmission portion to rotate in the first direction relative to the brush disc with a first maximum stroke, such that the engagement mechanism is engaged with the transmission portion.

6 . The cleaning device according to claim 2 , wherein after the lifting and lowering mechanism drives the transmission portion to lower in place, the rotating motor drives the transmission portion to rotate in the second direction relative to the brush disc with a second maximum stroke, such that the engagement mechanism is disengaged from the transmission portion.

7 . The cleaning device according to claim 1 , wherein the number of the cleaning apparatus is two, and the rotating directions of the transmission portions of the two cleaning apparatuses are opposite in a normal working state.

8 . The cleaning device according to claim 7 , wherein the at least one engagement portion is provided with a corresponding locking portion, and the locking portion is used for locking with the corresponding position-limiting portion in response to determining that each engagement portion is engaged with the corresponding position-limiting portion, so as to restrict the engagement portion from rotating towards the disengagement position.

9 . The cleaning device according to claim 8 , wherein the locking portion is mounted at a position on the edge of the transmission portion corresponding to the engagement portion;

the locking portion comprises an elastic arm, and an end of the elastic arm close to the corresponding position-limiting portion is provided with a curved portion; and

in response to determining that each engagement portion is engaged with the corresponding position-limiting portion, the position-limiting portion is at least partially located in the curved portion, so as to restrict the engagement portion from rotating towards the disengagement position.

10 . The cleaning device according to claim 1 , wherein the engagement mechanism comprises at least two engagement portions disposed on the transmission portion and position-limiting portions disposed on the brush disc and corresponding to the engagement portions respectively; and

after the brush disc is engaged with the transmission portion, in response to determining that the transmission portion drives the engagement portions to rotate to engagement positions, each engagement portion is engaged with the corresponding position-limiting portion; and in response to determining that the transmission portion drives the engagement portions to rotate to disengagement positions, each engagement portion is disengaged from the corresponding position-limiting portion.

11 . The cleaning device according to claim 10 , wherein after the brush disc is engaged with the transmission portion, all the engagement portions and all the position-limiting portions are located on an identical circumference.

12 . The cleaning device according to claim 10 , wherein each engagement portion comprises an engagement body, and the engagement body is connected with an outer edge of the transmission portion and extends towards a direction away from the transmission portion; the engagement body is provided with a clamping groove at least at a side opposite to the corresponding position-limiting portion, and each position-limiting portion comprises a position-limiting pin connected with the brush disc; and

in response to determining that the transmission portion drives the engagement bodies to rotate to the engagement positions, the clamping groove of each engagement body is engaged with the corresponding position-limiting pin; and in response to determining that the transmission portion drives the engagement bodies to rotate to the disengagement positions, the clamping groove of each engagement body is disengaged from the corresponding position-limiting pin.

13 . The cleaning device according to claim 12 , wherein each engagement body is provided with a first clamping groove at a first side and a second clamping groove at a second side, and the second side is a side of the engagement body opposite to the first side; the engagement positions comprise a first engagement position and a second engagement position;

in response to determining that the transmission portion drives the engagement bodies to rotate to the first engagement positions, the first clamping groove of each engagement body is engaged with the adjacent position-limiting pin; in response to determining that the transmission portion drives the engagement bodies to rotate to the second engagement position, the second clamping groove of each engagement body is engaged with the corresponding position-limiting pin; in response to determining that the transmission portion drives the engagement bodies to rotate to the disengagement positions, the first clamping groove of each engagement body is in contact and is engaged with the adjacent position-limiting pin, and the second clamping groove of each engagement body is in contact and is engaged with the adjacent position-limiting pin.

14 . The cleaning device according to claim 13 , wherein the at least one engagement portion is provided with a corresponding stop portion, and the stop portion is used for preventing the first clamping groove or the second clamping groove from being engaged with the adjacent position-limiting portion.

15 . The cleaning device according to claim 14 , wherein the stop portion is mounted at a position on the edge of the transmission portion corresponding to the first clamping groove or the second clamping groove, and the first clamping groove or the second clamping groove is at least partially shielded by the stop portion.

16 . The cleaning device according to claim 15 , wherein the stop portion is detachably connected with the edge of the transmission portion.

17 . The cleaning device according to claim 1 , wherein a guiding portion is disposed at the lower part of the transmission portion, an orientating portion adapted to the guiding portion is further disposed on the brush disc, and the transmission portion is engaged with the brush disc through cooperation of the guiding portion and the orientating portion.

18 . The cleaning device according to claim 17 , wherein the guiding portion is a protrusion extending downward from the transmission portion, and the orientating portion is a recess for accommodating the protrusion.

19 . The cleaning device according to claim 1 , wherein the cleaning device is a self-moving cleaning device.