CN220423843U - Mop lifting structure and cleaning equipment - Google Patents

Abstract

The utility model provides a mop lifting structure and cleaning equipment, wherein the mop lifting structure comprises: the driving device comprises an output shaft and a pushing piece fixedly connected with the output shaft; the transmission device is connected with the driving device and comprises a cam assembly, and a cam molded line with a height difference is arranged on the cam assembly; one end of the pushing piece, which is far away from the driving device, is abutted with the cam molded line, and the output shaft drives the pushing piece to circumferentially rotate, and the pushing piece drives the cam assembly to vertically move and/or horizontally circumferentially move. The mop lifting structure can effectively drive the mop unit to lift or descend, has a simple overall structure, is convenient and quick to produce and assemble, has strong practicability, effectively prolongs the service life of cleaning equipment, and improves the experience of users.

Description

Mop lifting structure and cleaning equipment

Technical Field

The utility model relates to the field of household cleaning appliances, in particular to a mop lifting structure and cleaning equipment.

Background

Along with the acceleration of the work rhythm of people and the continuous improvement of life demands, people are more and more used to replace the manual work to accomplish work such as sweeping, dust absorption, mopping, wherein novel intelligent sweeping and mopping integrated robot is especially popular among people.

Most of the existing sweeping and mopping robots on the market all adopt double-disc mopping cloth, in a family use scene, wet mopping cloth needs to be prevented from polluting carpets, the mopping cloth needs to have a lifting function, most of products with the lifting function on the market at present are lifted by adopting a screw rod scheme, the design is complex in structure, high in requirements on production precision and high in failure rate, bad user experience is brought, the service life of the products is also influenced, and more cost is needed.

In view of the foregoing, it is desirable to provide a mop lifting structure and cleaning apparatus that solve the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a mop lifting structure and cleaning equipment capable of realizing the lifting and descending functions of a mop.

In order to achieve the above object, the present utility model provides a mop lifting structure comprising:

the driving device comprises an output shaft and a pushing piece fixedly connected with the output shaft;

the transmission device is connected with the driving device and comprises a cam assembly, and a cam molded line with a height difference is arranged on the cam assembly;

one end of the pushing piece, which is far away from the driving device, is abutted with the cam molded line, and the output shaft drives the pushing piece to circumferentially rotate, and the pushing piece drives the cam assembly to vertically move and/or horizontally circumferentially move.

As a further improvement of the utility model, the cam assembly comprises a first position and a second position in the vertical direction, the height of the first position is higher than that of the second position, and when the height of the cam assembly is higher than that of the first position, the pushing piece drives the cam assembly to rotate along the horizontal direction in the circumferential direction, and meanwhile, the cam assembly descends along the vertical direction; when the height of the cam assembly is located at the first position, the cam assembly is clamped with the driving device, and circumferential rotation is stopped; when the height of the cam assembly is between the first position and the second position, the pushing piece circumferentially rotates and pushes the cam assembly to descend along the vertical direction; when the cam assembly is positioned at the second position, the cam assembly stops descending and is driven by the pushing piece to circumferentially rotate along the horizontal direction.

As a further improvement of the utility model, the transmission device further comprises an elastic component, wherein the elastic component is arranged in the cam component, when the cam component descends, the cam component presses the elastic component, and when the cam component ascends, the elastic component applies upward acting force to the cam component.

As a further improvement of the utility model, the cam assembly comprises a cam inner shaft, a clamping part is arranged in the cam inner shaft, and the elastic assembly is at least partially connected with the clamping part.

As a further improvement of the present utility model, the elastic member includes an elastic member and a fastener, the fastener is disposed at the bottom of the output shaft and configured to be assembled with the output shaft, the clamping portion is disposed at the top of the cam member, one end of the elastic member is connected to the clamping portion, the other end is abutted to the fastener, and when the cam member moves downward, the top of the cam member compresses the elastic member downward.

As a further improvement of the utility model, the cam profile comprises a head end and a tail end, a height difference is arranged between the head end and the tail end, the cam profile is a continuous arc line, or the cam profile comprises straight sections and arc sections, at least two straight sections are arranged at the head end and the tail end respectively, and the arc sections are arranged between the straight sections.

As a further improvement of the utility model, the tail end is higher than the head end, and is provided with a stop block, which is arranged on the moving path of the pushing piece and configured to limit the pushing piece.

As a further improvement of the utility model, the outer side of the cam assembly is provided with a cam lug extending along the vertical direction, and the cam lug is positioned at the outer side of the stop block and is configured to be movably connected with the driving device.

As a further improvement of the utility model, the driving device comprises a tooth box assembly, the tooth box assembly comprises a first shell, the output shaft is arranged in the first shell, and the inner wall of the first shell is provided with a baffle rib extending along the vertical direction.

As a further improvement of the present utility model, the cam assembly includes a first position and a second position in a vertical direction, the first position being higher than the second position, the rib being in contact with the cam lug and the pusher being separated from the stopper when the cam assembly is in the first position, and the pusher being in contact with the stopper and the rib being separated from the cam lug when the cam assembly is in the second position.

As a further improvement of the utility model, when the cam assembly is positioned at the first position, the highest point of the cam lug is positioned on a plane higher than the lowest point of the blocking rib, the cam lug is abutted with the blocking rib, and a distance is reserved between the pushing piece and the blocking block; when the cam assembly descends from the first position to the second position, the pushing piece approaches to the stop block and is in abutting connection with the stop block, the cam lug moves downwards, the plane where the highest point of the cam lug is gradually lower than the plane where the lowest point of the stop rib is located, and therefore the cam lug is separated from contact with the stop rib, and the pushing piece drives the cam assembly to circumferentially rotate in the horizontal direction.

As a further development of the utility model, the drive device comprises a motor, which is in drive connection with the output shaft and via which the output shaft is driven to rotate in a first direction or in a second direction opposite to the first direction.

As a further improvement of the utility model, the cam assembly comprises a head end and a tail end with a height difference, the height of the tail end is larger than that of the head end, when the cam assembly is lifted, the motor drives the output shaft to rotate along the second direction until the pushing piece is out of contact with the straight section of the tail end, at the moment, the motor stops rotating, and the cam assembly is lifted under the acting force of the elastic assembly.

As a further improvement of the utility model, the cam assembly comprises a cam iron sheet, and the cam iron sheet is fixedly connected with the cam assembly through a screw to seal the cam assembly.

Another object of the present utility model is to provide a cleaning apparatus having the above-mentioned mop lifting structure.

To achieve the above object, the present utility model provides a cleaning apparatus comprising:

a mop unit;

according to the mop lifting structure, the mop lifting structure is connected with the mop unit and drives the mop unit to lift or descend or circumferentially rotate along the horizontal direction.

The beneficial effects of the utility model are as follows: compared with the prior art, the mop lifting structure has the advantages that the output shaft and the cam are assembled, the pushing piece on the output shaft is utilized to drive the cam assembly to rotate, lifting and descending movement of the cam assembly in the vertical direction is realized, and the mop unit is driven to lift.

Drawings

Figure 1 is a front view of a mop lifting structure according to a preferred embodiment of the present utility model.

Figure 2 is a sectional view of the mop lifting structure of figure 1 in a lowered condition.

Figure 3 is a cross-sectional view of the mop lifting structure of figure 1 in a raised position.

Fig. 4 is an exploded view of fig. 1.

Fig. 5 is a perspective view of the cam assembly of fig. 1.

Fig. 6 is a cross-sectional view of the cam assembly of fig. 1.

Fig. 7 is a perspective view of the dental box assembly of fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in detail with reference to the accompanying drawings and specific embodiments.

In this case, in order to avoid obscuring the present utility model due to unnecessary details, only the structures and/or processing steps closely related to the aspects of the present utility model are shown in the drawings, and other details not greatly related to the present utility model are omitted.

In addition, it should be further noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1 to 7, a mop lifting structure 100 according to the present utility model is provided, and the mop lifting structure 100 can be applied to a cleaning device to lift and lower a mop unit 3 on the cleaning device.

The mop lifting structure 100 of the present utility model comprises:

the driving device 1 comprises an output shaft 12 and a pushing piece 15 fixedly connected with the output shaft 12;

the transmission device 2 is connected with the driving device 1 and comprises a cam assembly 21, and a cam molded line 211 with a height difference is arranged on the cam assembly 21;

one end of the pushing piece 15 far away from the driving device 1 is abutted against the cam molded line 211, and the output shaft 12 drives the pushing piece 15 to rotate circumferentially and drives the cam assembly 21 to rotate and drive the cam assembly 21 to move in the vertical direction and/or the horizontal direction circumferentially through the pushing piece 15.

In the mop lifting structure 100, when the cam assembly 21 descends, the output shaft 12 drives the pushing member 15 to rotate along the first direction, the pushing member 15 moves to the highest position along the lowest position of the cam molded line 211, and in the process, the cam assembly 21 moves from top to bottom along the vertical direction to drive the mop unit 3 to descend; when the cam assembly 21 is lifted, the pushing piece 15 rotates along the second direction along with the output shaft 12, the pushing piece 15 moves to the lowest position of the cam molded line 211 along the highest position of the cam molded line 211, the cam assembly 21 moves from bottom to top along the vertical direction, the mop unit 3 is driven to rise, the whole structure is simple, the practicability is high, the assembly is convenient, and the mop is not easy to damage.

The cam assembly 21 comprises a first position and a second position in the vertical direction, the height of the first position is higher than that of the second position, and when the height of the cam assembly 21 is higher than that of the first position, the pushing piece 15 drives the cam assembly 21 to circumferentially rotate in the horizontal direction, and meanwhile, the cam assembly 21 descends in the vertical direction; when the height of the cam assembly 21 is located at the first position, the cam assembly 21 is clamped with the driving device 1, and circumferential rotation is stopped; when the height of the cam assembly 21 is between the first position and the second position, the pushing member 15 rotates circumferentially and pushes the cam assembly 21 to descend in the vertical direction; when the cam assembly 21 is at the second position, the cam assembly 21 stops descending and is driven to rotate circumferentially in the horizontal direction by the pushing member 15.

The transmission device further comprises an elastic component 22, the elastic component 22 is arranged in the cam component 21, when the cam component 21 descends, the cam component 21 presses the elastic component 22, and when the cam component 21 ascends, the elastic component 22 applies upward acting force to the cam component 21. When the cam assembly 21 descends, the pushing member 15 applies downward force to the cam assembly 21, meanwhile, the cam assembly 21 compresses the elastic assembly 22, and when the cam assembly 21 needs to be lifted, no additional power is needed to be provided, the elastic assembly 22 can apply upward force to the cam assembly 21 to drive the cam assembly 21 to lift.

In some embodiments, the cam assembly 21 includes a cam inner shaft 215 and a cam outer housing 216, a gap exists between the cam inner shaft 215 and the cam outer housing 216, and the cam inner shaft 215 and the cam outer housing 216 are fixedly connected through a connecting portion 217.

The cam inner shaft 215 is provided with a cam through hole 214, one end of the output shaft 12 is assembled with the cam assembly 21 through the cam through hole 214, the inside of the cam inner shaft 215 is provided with a clamping part 219, and the elastic assembly 22 is at least partially connected with the clamping part 219. In order to facilitate the assembly of the output shaft 12 and the cam assembly 21, a cam through hole 214 is provided in the cam assembly 21, and the assembly of the output shaft 12 and the cam assembly 21 can be completed rapidly only by passing the output shaft 12 through the cam through hole 214, and meanwhile, the elastic assembly 22 is clamped at the clamping part 219 to avoid displacement when being compressed or rebounded.

The elastic component 22 includes an elastic member 221 and a fastening member 222, the fastening member 222 is disposed at the bottom of the output shaft 12 and is received in the cam component 21, and is configured to be assembled with the output shaft 12, the clamping portion 219 is disposed at the top of the cam component 21, one end of the elastic member 221 abuts against the clamping portion 219, the other end abuts against the fastening member 222, and when the cam component 21 moves downward, the top of the cam component 21 compresses the elastic member 221 downward. Through joint portion 219, with the elastic component 221 completely built-in cam subassembly 21, compare in the elastic component 221 is arranged in the outside of cam subassembly 21, and such design makes the required space that occupies of mop lifting structure 100 less, and the structure is compacter, and the elastic component 221 is built-in the cam subassembly 21 can obtain better protection, avoids receiving the erosion, increase of service life.

In some embodiments, the elastic member 221 is a compression spring, and in other embodiments, the elastic member 221 may be other elastic members, which is not limited in any way by the present utility model.

The output shaft 12 is provided with a pushing piece 15, the pushing piece 15 comprises a pushing rod handle 152 and a pushing rod ring 151, the pushing rod handle 152 is positioned on two sides of the pushing rod ring 151, and the pushing rod ring 151 is sleeved on the output shaft 12. When the pushing member 15 is assembled with the output shaft 12, the pushing member 15 keeps consistent with the rotation of the output shaft 12 in operation, and the pushing member 15 acts to push the cam assembly 21 downwards in the vertical direction when the output shaft 12 rotates and the push rod handle 152 moves to the highest point along the lowest point of the cam profile 211.

The cam profile 211 includes a head end and a tail end, a height difference is provided between the head end and the tail end, the cam profile 211 is a continuous arc line, or the cam profile includes a straight section 210 and an arc section, the straight section 210 is provided with at least two, the at least two straight sections 210 are respectively arranged at the head end and the tail end, the arc line is arranged between the straight sections 210, the straight sections 210 are located at the same height in the vertical direction, and the projection in the horizontal direction is arc.

The tail end is higher than the head end, a stop block 218 is arranged on the tail end, and the stop block 218 is arranged on the moving path of the pushing piece 15 and is configured to limit the pushing piece 15. When the push rod handle 152 in the pushing piece 15 runs along the cam molded line 211 to the tail end of the cam molded line 211, the push rod handle 152 is abutted against the stop block 218, and the stop block 218 drives the cam assembly 21 to rotate, so that the mop unit 3 is driven to rotate, and the floor is cleaned.

The two cam profiles 211 are reversely and symmetrically arranged around the outer side of the cam assembly 21 and respectively abut against the two push rod handles 152, when the pushing member 15 rotates along the output shaft 12 along the first direction, the push rod handles 152 move along the head end (namely the lowest position) of the cam profile 211 to the tail end (namely the highest position) of the cam profile, in the process, the cam assembly 21 moves from the highest position to the lowest position along the vertical direction, the mop unit 3 is driven to descend, and when the pushing member 15 rotates along the output shaft 12 reversely, the push rod handles 152 move along the tail end of the cam profile 211 to the head end of the cam profile 211, in the process, the elastic assembly 22 pushes the cam assembly 21 to move from bottom to top along the vertical direction, and the mop unit 3 is driven to finish lifting.

In some embodiments, the gearbox assembly 16 includes a first housing 161, the output shaft 12 is mounted in the first housing 161, the first housing 161 is sleeved outside the cam assembly 21, a rib 162 extending along a vertical direction is disposed on an inner wall of the first housing 161, a cam lug 212 extending along a vertical direction is disposed outside the cam assembly 21, and the cam lug 212 is located outside the stop block 218 and is configured to be movably connected with the driving device 1. When the pushing piece 15 is not in contact with the stop block 218, the highest point of the cam lug 212 is higher than the lowest point of the stop rib 162, and when the output shaft 12 rotates, the pushing rod handle 152 drives the cam lug 212 to be in contact with the stop rib 162.

The cam assembly 21 includes a first position and a second position in the vertical direction, the first position being higher than the second position, when the cam assembly 21 is in the first position, the rib 162 is in contact with the cam lug 212 and the pushing member 15 is separated from the stopper 218, and when the cam assembly 21 is in the second position, the pushing member 15 is in contact with the stopper 218 and the rib 162 is separated from the cam lug 212.

When the cam assembly 21 is located at the first position, the plane of the highest point of the cam lug 212 is higher than the plane of the lowest point of the stop rib 162, the cam lug 212 abuts against the stop rib 162, and a distance is reserved between the pushing member 15 and the stop block 218; when the cam assembly 21 descends from the first position to the second position, the pushing member 15 approaches the stop block 218 and abuts against the stop block 218, the cam lug 212 moves downward, the plane of the highest point of the cam lug 212 is gradually lower than the plane of the lowest point of the stop rib 162, and thus the cam lug 212 is out of contact with the stop rib 162, and the pushing member 15 drives the cam assembly 21 to rotate circumferentially in the horizontal direction. At this point the mop unit 3 has been brought into contact with the ground in a direction opposite to the direction in which the motor 11 is turned by the friction force generated by the ground against the mop unit 3.

The drive device 1 comprises a motor 11, the motor 11 is in transmission connection with an output shaft 12, and the output shaft 12 is driven by the motor 11 to rotate in a first direction or in a second direction opposite to the first direction.

In some embodiments, the cam assembly 21 includes a head end and a tail end with a height difference, and the height of the tail end is greater than that of the head end, when the cam assembly 21 is lifted, the motor 11 drives the output shaft 12 to rotate along the second direction until the pushing member 15 is out of contact with the straight section of the tail end, at this time, the motor 11 stops rotating, the cam assembly 21 is lifted under the action of the elastic assembly 22, and by such arrangement, when the cam assembly 21 is lifted, the motor 11 only needs to rotate for a small time, which is beneficial to saving energy. In other embodiments, the motor 11 may be configured to continue rotating while the cam assembly 21 is being lifted, as the utility model is not limited in this regard.

The gear box assembly 16 comprises a second shell 163 and a gear set 164, the motor 11 is arranged in the second shell 163, the gear set 164 is located between the first shell 161 and the second shell 163, the gear set 164 is respectively meshed with the motor 11 and the output shaft 12, the gear set 164 is driven to rotate when the motor 11 rotates, the gear set 164 simultaneously drives the output shaft 12 to rotate, the layout structure is more compact, and the transmission efficiency is high. Specifically, the gear set 164 may be one gear or a plurality of gears, and by adjusting the gear set 164, speed reduction of different multiples may be achieved. For example, when the lifting or lowering speed of the mop unit 3 is required to be high, a low multiple (for example, 5-10 times) can be adjusted to ensure the movement speed of the mop unit 3; when the position accuracy of lifting or lowering the mop unit 3 is required to be higher, a higher multiple (for example, 20-30 times) can be adjusted to ensure accurate control of the rotation angle of the output shaft 12.

When the mop unit 3 needs to be lowered, the motor 11 rotates along the first direction to drive the output shaft 12 to rotate, the push rod handle 152 rotates along the output shaft 12, the push rod handle 152 is abutted against the cam molded line 211 to drive the cam assembly 21 to run at the highest position for one end time, when the cam lug 212 is abutted against the blocking rib 162, the cam assembly 21 stops rotating at the moment because of the blocking rib 162, the push rod handle 152 continues to rotate under the drive of the output shaft 12 and runs along the cam molded line 211, the push rod handle 152 runs from the lowest position to the highest position of the cam molded line 211, downward acting force is applied to the cam assembly 21 in the running process to push the cam assembly 21 to run from the highest position to the lowest position, and meanwhile, the elastic piece 221 is compressed to finish the lowering of the cam assembly 21;

when the mop unit 3 is lifted, the motor 11 drives the tooth box assembly 16 to reversely rotate, the cam lug 212 is in contact with the stop rib 162, the push rod handle 152 moves to the lowest position of the cam molded line 211 along the highest position of the cam molded line 211, in the process, the compressed elastic piece 221 rebounds, and an upward acting force is applied to the cam assembly 21, so that the lifting of the cam assembly 21 is completed.

In some embodiments, the motor 11 may be a stepper motor. A stepper motor is a motor that converts an electrical pulse signal into a corresponding angular or linear displacement. Each time a pulse signal is input, the rotor rotates by an angle or further, the output angular displacement or linear displacement is proportional to the input pulse number, and the rotating speed is proportional to the pulse frequency. Under the condition that the stepping motor does not input a rotation signal, the rotor cannot continue to rotate, so that the rotation speed of the cam assembly 21 can be controlled by the stepping motor, the cam assembly 21 is controlled to rotate at a lower speed when the cam assembly 21 runs in the vertical direction, and the cam assembly 21 is controlled to rotate at a higher rotation speed when the cam assembly 21 is at the lowest position, so that the mop unit 3 is driven to clean the ground.

The cam assembly 21 includes a cam iron piece 213, and the cam iron piece 213 is fixedly connected with the cam assembly 21 to seal the cam assembly 21. In the cleaning process of the mop unit 3 to the ground, water drops and sundries are easy to infiltrate into the cam assembly 21, so that the cam assembly 21 is damaged, after the cam assembly 21 is sealed by the cam iron sheet 213, the water drops and the sundries can be effectively prevented from entering the cam assembly 21, the inner structure of the cam assembly 21 is protected, and the service life of the cam assembly 21 is effectively prolonged.

In some embodiments, the mop lifting structure 100 further comprises a position detecting device (not shown) for controlling the lifting position of the mop unit 3, and the position of the mop unit 3 can be better controlled by the position detecting device, so that the lifting process is more controllable, and the use experience is improved.

The utility model further provides cleaning equipment, which comprises the mop lifting structure 100 and the mop unit 3, wherein the mop lifting structure 100 is connected with the mop unit 3 to drive the mop unit 3 to lift or descend or rotate circumferentially along the horizontal direction for cleaning the floor. The elastic connecting piece 311 is arranged between the mop unit 3 and the cam assembly 21, so that when the mop unit 3 encounters uneven ground, the mop unit 3 can move up and down within a certain range relative to the cam assembly 21, the trafficability and adaptability of the cleaning device in the cleaning process are improved, and meanwhile, the cleaning device can be ensured to be in close contact with the ground, and a better cleaning effect is provided. The cleaning device can control the lifting of the mop unit 3 according to different scenes, and brings good use experience to users.

The mop unit 3 comprises a mop (not shown), a rotary table 32 and a rotary shaft 31, the mop is attached to the bottom of the rotary table 32, the rotary table 32 is connected with the rotary shaft 31, the cam assembly 21 is clamped with the rotary shaft 31 and sleeved outside the rotary shaft 31, and the rotation of the cam assembly 21 drives the rotary shaft 31 and the rotary table 32 of the mop unit 3 to rotate, so that the rotary cleaning of the ground is realized.

In some embodiments, the top of the rotating shaft 31 has magnetism, and can be directly magnetically attracted to the cam iron sheet 213, so that when the mop unit 3 and the cam assembly 21 are assembled, the assembling process can be quickly completed through the magnetic attraction of the cam iron sheet 213 and the rotating shaft 31.

In summary, in the mop lifting structure 100 of the present utility model, when the cam assembly 21 needs to be lowered, the motor 11 drives the output shaft 12 to rotate along the first direction, the pushing member 15 fixedly connected with the output shaft 12 moves along the cam profile 211 to drive the cam assembly 21 to rotate, when the cam lug 212 of the cam assembly 21 abuts against the rib 162, the cam assembly 21 stops rotating, the pushing member 15 continues to move along the cam profile 211 to push the cam assembly 21 to descend in the vertical direction, the cam assembly 21 compresses the elastic assembly 22 when being lowered, when the pushing member 15 abuts against the stop block 218, the cam lug 212 is separated from the rib 162, the lowering of the cam assembly 21 is completed, the mop unit 3 connected with the cam assembly 21 contacts the ground, and the pushing member 15 drives the cam assembly 21 to continuously rotate to clean the ground. After cleaning, when the cam assembly 21 needs to be lifted, the motor 11 starts to rotate along the second direction and immediately stops rotating, and at the moment, the compressed elastic assembly 22 rebounds to apply upward acting force to the cam assembly 21 to drive the cam assembly 21 to lift. The mop lifting structure 100 is simple in structure, convenient and quick to assemble, good in durability of each component, high in transmission efficiency and high in practicality and economy.

The above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model.

Claims (15)

1. A mop lifting structure, characterized by comprising:

the driving device comprises an output shaft and a pushing piece fixedly connected with the output shaft;

the transmission device is connected with the driving device and comprises a cam assembly, and a cam molded line with a height difference is arranged on the cam assembly;

one end of the pushing piece, which is far away from the driving device, is abutted with the cam molded line, and the output shaft drives the pushing piece to circumferentially rotate, and the pushing piece drives the cam assembly to vertically move and/or horizontally circumferentially move.

2. Mop lifting structure according to claim 1, characterized in that: the cam component comprises a first position and a second position in the vertical direction, the height of the first position is higher than that of the second position, and when the height of the cam component is higher than that of the first position, the pushing piece drives the cam component to circumferentially rotate in the horizontal direction, and meanwhile, the cam component descends in the vertical direction; when the height of the cam assembly is located at the first position, the cam assembly is clamped with the driving device, and circumferential rotation is stopped; when the height of the cam assembly is between the first position and the second position, the pushing piece circumferentially rotates and pushes the cam assembly to descend along the vertical direction; when the cam assembly is positioned at the second position, the cam assembly stops descending and is driven by the pushing piece to circumferentially rotate along the horizontal direction.

3. Mop lifting structure according to claim 1, characterized in that: the transmission device further comprises an elastic component, the elastic component is arranged in the cam component, when the cam component descends, the cam component extrudes the elastic component, and when the cam component ascends, the elastic component applies upward acting force to the cam component.

4. A mop lifting structure according to claim 3, wherein: the cam assembly comprises a cam inner shaft, a clamping part is arranged in the cam inner shaft, and the elastic assembly is at least partially connected with the clamping part.

5. The mop lifting structure according to claim 4, wherein: the elastic component includes elastic component and fastener, the fastener sets up the bottom of output shaft, be configured to with the output shaft assembly, joint portion sets up cam component's top, the one end of elastic component with joint portion is connected, the other end with the fastener butt, when cam component moves down, cam component's top downward compression the elastic component.

6. Mop lifting structure according to claim 1, characterized in that: the cam molded lines include head end and tail end, have the difference in height between the head end with the tail end, the cam molded lines is continuous arc line, perhaps, the cam molded lines include straight section and arc section, straight section is equipped with two at least, two at least straight section sets up respectively the head end with the tail end, the arc section sets up between the straight section.

7. The mop lifting structure according to claim 6, wherein: the tail end is higher than the head end in height, a stop block is arranged on the tail end and arranged on a moving path of the pushing piece and configured to limit the pushing piece.

8. The mop lifting structure according to claim 7, wherein: the outside of cam subassembly is equipped with the cam ear that extends along vertical direction, the cam ear is located the outside of backstop piece, dispose with drive arrangement swing joint.

9. The mop lifting structure according to claim 8, wherein: the driving device comprises a tooth box assembly, the tooth box assembly comprises a first shell, the output shaft is installed in the first shell, and a blocking rib extending along the vertical direction is arranged on the inner wall of the first shell.

10. Mop lifting structure according to claim 9, characterized in that: the cam assembly comprises a first position and a second position in the vertical direction, the height of the first position is higher than that of the second position, when the cam assembly is located at the first position, the blocking rib is in contact with the cam lug, the pushing piece is separated from the blocking block, when the cam assembly is located at the second position, the pushing piece is in contact with the blocking block, and the blocking rib is separated from the cam lug.

11. Mop lifting structure according to claim 10, characterized in that: when the cam assembly is positioned at the first position, the plane of the highest point of the cam lug is higher than the plane of the lowest point of the blocking rib, the cam lug is abutted with the blocking rib, and a distance is reserved between the pushing piece and the stop block; when the cam assembly descends from the first position to the second position, the pushing piece approaches to the stop block and is in abutting connection with the stop block, the cam lug moves downwards, the plane where the highest point of the cam lug is gradually lower than the plane where the lowest point of the stop rib is located, and therefore the cam lug is separated from contact with the stop rib, and the pushing piece drives the cam assembly to circumferentially rotate in the horizontal direction.

12. A mop lifting structure according to claim 3, wherein: a mop lifting structure according to claim 2, wherein the drive means comprises a motor in driving connection with the output shaft, by means of which the output shaft is driven to rotate in a first direction or in a second direction opposite to the first direction.

13. Mop lifting structure according to claim 12, characterized in that: the cam component comprises a head end and a tail end with height difference, the height of the tail end is larger than that of the head end, when the cam component is lifted, the motor drives the output shaft to rotate along the second direction until the pushing piece is separated from contact with the straight section of the tail end, at the moment, the motor stops rotating, and the cam component is lifted under the acting force of the elastic component.

14. Mop lifting structure according to claim 1, characterized in that: the cam assembly comprises a cam iron sheet, and the cam iron sheet is fixedly connected with the cam assembly through a screw to seal the cam assembly.

15. A cleaning apparatus, comprising:

a mop unit;

the mop lifting structure of any one of claims 1 to 14, which is connected to the mop unit and drives the mop unit to rise or fall or to rotate circumferentially in a horizontal direction.