Floor sweeping robot lifting device

Abstract

The utility model relates to the technical field of sweeping robots, in particular to a sweeping robot lifting device which comprises a driving module and a lifting module, the driving module comprises a threaded rod and a threaded gear, the threaded gear and the threaded rod are in threaded assembly, and the lifting module is externally connected with a cleaning part used for cleaning the ground. The lifting module is connected with the threaded gear, and when the threaded rod rotates, the lifting module has a resistance effect on the threaded gear, so that the threaded gear drives the lifting module and the cleaning piece to ascend and descend along the threaded rod. The problems that a traditional sweeping robot generally drives a cleaning part to ascend and descend through a telescopic mechanism, and the telescopic mechanism is difficult to meet the requirement that the sweeping robot needs different ascending and descending speeds for the cleaning part under different conditions are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sweeping robots, in particular to a sweeping robot lifting device. BACKGROUND

[0002] The sweeping robot is a modern intelligent home device, which has become an important household helper for many families. Relying on advanced navigation technology, intelligent algorithm and efficient cleaning system, the sweeping robot provides great convenience for users in busy daily life. With the continuous development of technology, the sweeping robot will become more intelligent and multifunctional, further improving the efficiency of household cleaning and user experience.

[0003] Generally, the sweeping robot is provided with a cleaning piece for cleaning the ground. The traditional sweeping robot generally drives the cleaning piece to lift through the telescopic mechanism. However, the telescopic mechanism is difficult to meet the requirement that the cleaning piece needs to have different lifting speeds in different situations. CONTENT OF THE UTILITY MODEL

[0004] The sweeping robot lifting device provided by the present application aims to solve the problem that the traditional sweeping robot generally drives the cleaning piece to lift through the telescopic mechanism, which is difficult to meet the requirement that the cleaning piece needs to have different lifting speeds in different situations.

[0005] In order to solve the above technical problems, the present application provides a sweeping robot lifting device, which comprises a driving module and a lifting module.

[0006] The driving module comprises a threaded rod and a threaded gear, and the threaded gear is threadedly assembled with the threaded rod.

[0007] The lifting module is connected with the threaded gear, and when the threaded rod rotates, the lifting module has a resistance effect on the threaded gear, so that the threaded gear drives the lifting module and the cleaning piece to ascend and descend along the threaded rod.

[0008] Further, the lifting module comprises a rotating assembly, the rotating assembly comprises a first gear, the first gear is engaged with the threaded gear, and the rotating assembly is connected with the cleaning piece, so that the threaded gear can drive the rotating assembly and the cleaning piece to rotate and clean.

[0009] Further, the lifting module further comprises a damping rubber ring, the position of the damping rubber ring is fixed, and the damping rubber ring is sleeved on the rotating assembly. The damping rubber ring has a resistance effect on the rotation of the rotating assembly, so that the rotating assembly has a resistance effect on the rotation of the threaded gear.

[0010] Further, the rotating assembly comprises a rotating cylinder, the rotating cylinder comprises a first cylinder body and a second cylinder body, the diameter of the first cylinder body is smaller than the diameter of the second cylinder body, during the process that the rotating cylinder is lifted along with the screw gear, the damping rubber ring is in contact with the second cylinder body, at this time the damping rubber ring has a resistance effect on the rotation of the rotating cylinder, when the rotating cylinder is lowered to the limit position along with the screw gear, the damping rubber ring is located at the first cylinder body, at this time the damping rubber ring has no resistance effect on the rotation of the rotating cylinder.

[0011] Further, the lifting module further comprises a mounting block and an elastic connecting piece, the mounting block is used for externally connecting the cleaning piece, one end of the elastic connecting piece is connected with the rotating assembly and the other end of the elastic connecting piece is connected with the mounting block, when the rotating assembly is lowered to the limit position, the cleaning piece is in contact with the ground, so that the elastic connecting piece is compressed.

[0012] Further, when the screw gear drives the rotating assembly to rise from the limit position, the rotating assembly is subjected to the elastic force of the elastic connecting piece, so that the rotating cylinder rises relative to the damping rubber ring, and then the damping rubber ring is in contact with the second cylinder body.

[0013] Further, the driving module further comprises a driving device, a second gear, a third gear and a fourth gear, the second gear and the third gear are concentrically arranged and fixedly connected, the second gear is connected with the output end of the driving device, the gear number of the second gear is greater than the gear number of the third gear, the fourth gear is fixedly installed on one end of the screw rod close to the driving device, and the fourth gear is engaged with the third gear.

[0014] Further, the sweeping robot lifting device further comprises a photoelectric switch, when the rotating assembly rises to the limit position, the rotating assembly triggers the photoelectric switch, so that the driving device stops rotating.

[0015] Further, the sweeping robot lifting device further comprises a Hall element, a magnet is arranged in the mounting block, and the Hall element is used for detecting the position of the magnet, when the position of the magnet is not within a preset working range, the robot lifting device stops working.

[0016] Further, the lifting module further comprises a first bearing, and the first bearing is sleeved on the rotating cylinder.

[0017] The beneficial effect of the present application is that in the sweeping robot lifting device provided by the present application, the sweeping robot lifting device comprises a driving module and a lifting module, the driving module comprises a threaded rod and a threaded gear, the threaded gear is threadedly assembled with the threaded rod, the lifting module is circumscribed with a cleaning piece for cleaning the ground, and the lifting module is connected with the threaded gear; when the threaded rod rotates, the lifting module has a resistance effect on the threaded gear, so that the threaded gear drives the lifting module and the cleaning piece to ascend and descend along the threaded rod. The speed of the threaded gear driving the cleaning piece to ascend and descend can be adjusted by adjusting the rotating speed of the threaded rod, so that the requirement of the sweeping robot that the cleaning piece needs to have different ascending and descending speeds under different conditions is met. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings. Among them:

[0019] Figure 1 is a perspective structural schematic view of the sweeping robot lifting device of an embodiment of the present application;

[0020] Figure 2 is a perspective structural schematic view of the sweeping robot lifting device of an embodiment of the present application after removing the first shell and the second shell;

[0021] Figure 3 is a perspective structural schematic view of the driving module and the lifting module of an embodiment of the present application;

[0022] Figure 4 is an exploded view of the lifting module of an embodiment of the present application.

[0023] Explanation of reference numerals: 100, driving module; 110, threaded rod; 120, threaded gear; 130, driving device; 140, second gear; 150, third gear; 160, fourth gear; 200, lifting module; 210, gear piece; 211, first gear; 212, baffle; 220, gasket; 230, damping rubber ring; 240, rotating cylinder; 241, first cylinder body; 242, second cylinder body; 250, mounting block; 251, fixed plate; 260, elastic connecting piece; 270, first bearing; 280, fixed shaft; 290, second bearing; 300, photoelectric switch; 400, Hall element; 500, magnet; 600, first shell; 700, second shell. DETAILED DESCRIPTION

[0024] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0025] Those skilled in the art can understand that the singular forms "a," "an," and "the" used herein include plural forms unless specifically stated to the contrary. It should be further understood that the use of the term "include" in the specification of the present application means that a feature, integer, step, operation, element, module, module and / or assembly exists, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, modules, assemblies and / or combinations thereof. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there can be intermediate elements. In addition, "connected" or "coupled" used herein can include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any module and all combinations of the associated listed items.

[0026] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art to which the present application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have meanings consistent with those in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as such.

[0027] As shown in Figure 2 The present application provides a sweeping robot lifting device, which comprises a driving module 100 and a lifting module 200. The driving module 100 comprises a threaded rod 110 and a threaded gear 120, and the threaded gear 120 is threadedly assembled with the threaded rod 110. The lifting module 200 circumscribes a cleaning element for cleaning the ground. The lifting module 200 is connected with the threaded gear 120. When the threaded rod 110 rotates, the lifting module 200 has a resistance effect on the threaded gear 120, so that the threaded gear 120 drives the lifting module 200 and the cleaning element to ascend and descend along the threaded rod 110.

[0028] In a specific embodiment, the driving module 100 is the power source of the entire lifting device, mainly responsible for providing the power to lift the cleaning element. Among them, the threaded rod 110 is a rod-shaped component with threads, which can convert rotary motion into linear motion of the threaded gear 120 when rotating. The threaded gear 120 is a gear that cooperates with the threaded rod 110, and the center position has threads that match the threaded rod 110. Through the threaded assembly with the threaded rod 110, when the threaded rod 110 rotates, the threaded gear 120 will move along the axial direction of the threaded rod 110.

[0029] The lifting module 200 is the part connecting the cleaning element and the driving module 100, and the lifting module 200 is connected with the threaded gear 120. When the threaded gear 120 moves on the threaded rod 110, it will drive the lifting module 200 to move together, thereby realizing the lifting and lowering of the cleaning element. The cleaning element here can be the brush, mop or other parts used for cleaning the floor of the robot. The lifting module 200 has a resistance effect on the threaded gear 120, which is the key to ensuring the stable movement of the threaded gear 120 on the threaded rod 110. Without this resistance, the threaded gear 120 may idle with the threaded rod 110 and cannot realize the lifting function. For example, in actual application, when the motor of the driving module 100 drives the threaded rod 110 to rotate clockwise, due to the resistance of the lifting module 200 to the threaded gear 120, the threaded gear 120 will move upward along the threaded rod 110, thereby driving the cleaning element to rise; conversely, when the threaded rod 110 rotates counterclockwise, the threaded gear 120 will drive the cleaning element to descend.

[0030] In summary, through the cooperation of the simple threaded rod 110 and the threaded gear 120, the lifting function of the cleaning element is realized, the structure is simple, and the production cost is reduced. Secondly, the reliability of this structure is high, which can stably realize the lifting operation of the cleaning element and avoid the fault problems that may be caused by complex structures. In addition, by controlling the rotation speed of the threaded rod 110, the lifting speed of the cleaning element can be accurately controlled, improving the cleaning adaptability and flexibility of the robot, and better meeting the needs of different cleaning scenes.

[0031] As shown in Figure 3 The lifting module 200 includes a rotating assembly, which includes a first gear 211 engaged with the threaded gear 120. The rotating assembly is connected with the cleaning element, so that the threaded gear 120 can drive the rotating assembly and the cleaning element to rotate and clean.

[0032] In one specific embodiment, the rotating assembly is an important component of the lifting module 200, and its main function is to drive the cleaning component to rotate. The rotating assembly includes a gear component 210, with a first gear 211 on its outer periphery. The first gear 211 meshes with a threaded gear 120, thereby enabling the threaded gear 120 to drive the gear component 210 to rotate. Since the rotating assembly is connected to the cleaning component, the cleaning component also rotates with the rotating assembly, realizing the function of rotational cleaning. Furthermore, a baffle 212 is provided on the outer periphery of the gear component 210, and the baffle 212 is located above the first gear 211. The rotating assembly also includes a washer 220, which is sleeved on the gear component 210 and located below the first gear 211. The baffle 212 and the washer 220 clamp the threaded gear 120 and the first gear 211, thereby enabling the threaded gear 120 to drive the gear component 210 to move along the threaded rod 110.

[0033] In summary, this method of achieving rotational cleaning through gear transmission is compact in structure, highly efficient in transmission, and can fully utilize the power of the drive module 100, reduce energy loss, and improve the overall performance of the sweeping robot.

[0034] like Figure 1 and Figure 3 As shown, the lifting module 200 also includes a damping ring 230. The position of the damping ring 230 is fixed, and the damping ring 230 is sleeved on the rotating component. The damping ring 230 has a resistance effect on the rotation of the rotating component, so that the rotating component has a resistance effect on the rotation of the threaded gear 120.

[0035] In one specific embodiment, the lifting device of the sweeping robot further includes a first housing 600 and a second housing 700. The first housing 600 and the second housing 700 are assembled together to form a space for accommodating the drive module 100 and the lifting mechanism. The lifting module 200 includes a damping rubber ring 230, which is generally annular and is a rubber ring with elastic and damping properties. The damping rubber ring 230 is fixedly installed in the second housing 700 and surrounds the outside of the rotating component, allowing it to be in close contact with the rotating component. When the rotating component rotates, the damping rubber ring 230 generates a certain frictional force, which hinders the rotation of the rotating component.

[0036] When the threaded rod 110 rotates, the damping rubber ring 230 is in close contact with the rotating component, and the damping rubber ring 230 will generate resistance to the rotation of the rotating component. This resistance will be transmitted to the threaded gear 120 through the rotating component, so that the threaded gear 120 cannot rotate with the threaded rod 110, thereby forcing the threaded gear 120 to rise or fall along the threaded rod 110.

[0037] like Figure 4As shown, the rotating assembly includes a rotating cylinder 240, which includes a first cylinder body 241 and a second cylinder body 242, the diameter of the first cylinder body 241 is smaller than that of the second cylinder body 242. During the lifting and lowering of the rotating cylinder 240 along with the threaded gear 120, the damping rubber ring 230 is in contact with the second cylinder body 242, at this time, the damping rubber ring 230 has a resistance effect on the rotation of the rotating cylinder 240. When the rotating cylinder 240 is lowered to the limit position along with the threaded gear 120, the damping rubber ring 230 is located at the first cylinder body 241, at this time, the damping rubber ring 230 does not have a resistance effect on the rotation of the rotating cylinder 240.

[0038] In a specific embodiment, the rotating cylinder 240 is in the shape of a cylinder as a whole, which is composed of the first cylinder body 241 and the second cylinder body 242, and the diameter of the first cylinder body 241 is slightly smaller than that of the second cylinder body 242. The gear member 210 is inserted into the first cylinder body 241, and the gear member 210 is fixedly assembled with the rotating cylinder 240 by screws, and the gasket 220 is fixedly assembled with the first cylinder body 241 close to one end of the first gear 211. During the lifting and lowering of the rotating cylinder 240 along with the threaded gear 120, the damping rubber ring 230 is located at the position of the second cylinder body 242, and the damping rubber ring 230 is in close contact with the second cylinder body 242, generating a large friction force, thereby generating a resistance to the rotation of the rotating cylinder 240, and further generating a resistance to the rotation of the threaded gear 120. When the rotating cylinder 240 is lowered to the limit position, the damping rubber ring 230 is located at the first cylinder body 241, and since the diameter of the first cylinder body 241 is smaller, at this time, the damping rubber ring 230 is not in contact with the rotating cylinder 240, that is, the damping rubber ring 230 does not have a resistance effect on the rotation of the rotating cylinder 240, thereby enabling the threaded gear 120 to drive the rotating cylinder 240 and the cleaning member to rotate freely, and completing the cleaning work.

[0039] In summary, through the dynamic movement of the rotating cylinder 240, the damping rubber ring 230 is located at different positions of the rotating cylinder 240, thereby enabling the resistance of the damping rubber ring 230 to the rotating cylinder 240 to change. During the lifting and lowering process, the existence of the resistance ensures the stability of the lifting and lowering process; during the cleaning process, the removal of the resistance can reduce energy consumption and improve cleaning efficiency. This dynamic adjustment mode fully considers the actual working requirements of the sweeping robot, and improves the practicability of the entire lifting device.

[0040] As shown in Figure 4 The lifting module 200 further includes a mounting block 250 and an elastic connecting member 260, the mounting block 250 is used to externally connect the cleaning member, one end of the elastic connecting member 260 is connected with the rotating assembly, and the other end of the elastic connecting member 260 is connected with the mounting block 250. When the rotating assembly is lowered to the limit position, the cleaning member is in contact with the ground, so that the elastic connecting member 260 is compressed.

[0041] In a specific embodiment, the mounting block 250 is a substantially hexagonal cylinder, which is a component for mounting the cleaning element and provides a fixed connection point for the cleaning element. The elastic connecting element 260 is a component with elasticity, which is connected to the rotating assembly and the mounting block 250 at both ends and plays a role in connection and buffering. In this embodiment, the elastic connecting element 260 is a spring. During the descent of the rotating assembly, the cleaning element is in contact with the ground and cannot continue to descend due to the obstruction of the ground, while the rotating assembly is still descending. At this time, the elastic connecting element 260 will be compressed, and through the elastic effect of the elastic connecting element 260, the cleaning element can better adhere to the ground, ensuring the cleaning effect. At the same time, the elasticity of the elastic connecting element 260 can also buffer the impact force between the cleaning element and the ground, reducing damage to the cleaning element and the robot.

[0042] In summary, the provision of the elastic connecting element 260 enables the cleaning element to better adapt to different ground conditions, whether it is a flat ground or a ground with certain undulations. The cleaning element can closely adhere to the ground for cleaning, improving the thoroughness of cleaning. In addition, the buffering effect of the elastic connecting element 260 can prolong the service life of the cleaning element and the robot, reducing damage caused by excessive impact force.

[0043] As shown in Figure 4 When the threaded gear 120 drives the rotating assembly to rise from the limit position of descent, the rotating assembly is subjected to the elastic force of the elastic connecting element 260, causing the rotating cylinder 240 to rise relative to the damping rubber ring 230, and further causing the damping rubber ring 230 to come into contact with the second cylinder 242.

[0044] In a specific embodiment, when the rotating assembly is at the limit position of descent, the elastic connecting element 260 is in a compressed state, and because the threaded gear 120 has a downward movement tendency when it descends to the limit position, the elastic connecting element 260 cannot expand and will store a certain amount of elastic potential energy. When the threaded rod 110 is rotated in the opposite direction, the threaded gear 120 has a rising movement tendency. At this time, the elastic connecting element 260 releases the elastic potential energy and generates an elastic force, which acts on the rotating assembly, causing the rotating cylinder 240 to slightly rise relative to the damping rubber ring 230 in a fixed position. Further, the damping rubber ring 230 originally located at the first cylinder 241 will re-contact the second cylinder 242, thereby restoring the damping rubber ring 230's resistance to the rotating cylinder 240, and further restoring the resistance of the lifting module 200 to the threaded gear 120, ensuring that the threaded gear 120 can stably rise along the threaded rod 110.

[0045] In summary, the elastic force of the elastic connecting element 260 enables the rotating cylinder 240 to automatically adjust the position, causing the damping rubber ring 230 to re-exert its effect, ensuring smooth switching between different working states of the robot lifting device.

[0046] As shown in Figure 2 , the driving module 100 further comprises a driving device 130, a second gear 140, a third gear 150 and a fourth gear 160, the second gear 140 and the third gear 150 are concentrically arranged and fixedly connected, the second gear 140 is connected with the output end of the driving device 130, the gear number of the second gear 140 is greater than that of the third gear 150, the fourth gear 160 is fixedly installed at one end of the threaded rod 110 close to the driving device 130, and the fourth gear 160 is engaged with the third gear 150.

[0047] In a specific embodiment, the driving device 130 is a motor, the driving device 130 is the power source of the entire driving module 100, it provides rotary power, the second gear 140 and the third gear 150 are concentrically arranged and integrally formed, the gear number of the second gear 140 is greater than that of the third gear 150, so that the second gear 140 and the third gear 150 form a speed reduction mechanism. The second gear 140 is engaged with the output end of the driving device 130, the fourth gear 160 is fixedly installed at one end of the threaded rod 110 close to the driving device 130, and the fourth gear 160 is engaged with the third gear 150. After the driving device 130 is started, the second gear 140 is driven to rotate, since the second gear 140 and the third gear 150 are integrally formed, the third gear 150 also rotates. Since the gear number of the second gear 140 is greater than that of the third gear 150, the effect of speed reduction is achieved, and the rotation of the third gear 150 is transmitted to the threaded rod 110 through the engagement of the fourth gear 160, so that the threaded rod 110 rotates, and then drives the threaded gear 120 and the lifting module 200 to move.

[0048] In summary, through the gear transmission mode, the rotation speed and torque can be adjusted according to actual needs, and the efficiency and stability of power transmission are improved. The setting of the speed reduction mechanism can make the driving device 130 output larger torque at lower rotation speed, avoid the overload operation of the motor, and prolong the service life of the motor.

[0049] As shown in Figure 1 , the sweeping robot lifting device further comprises a photoelectric switch 300, when the rotating assembly rises to the limit position, the rotating assembly will trigger the photoelectric switch 300, so that the driving device 130 stops rotating.

[0050] In a specific embodiment, the photoelectric switch 300 is fixedly installed on the first housing 600, the photoelectric switch 300 is a sensor for detecting the position of an object by emitting and receiving light, when the rotating assembly rises to the limit position, the top of the gear piece 210 will block the light emitted by the photoelectric switch 300, thereby triggering the photoelectric switch 300,

[0051] When the photoelectric switch 300 is triggered, it sends a signal to the driving device 130 to stop rotating, avoiding damage caused by the continued upward movement of the rotating assembly.

[0052] In summary, the photoelectric switch 300 can accurately detect the position of the rotating assembly and stop the driving device 130 in time, preventing the rotating assembly from exceeding the normal range of motion and avoiding mechanical damage caused by excessive upward movement.

[0053] As shown in Figure 1 and Figure 4 The robotic cleaning device also includes a Hall element 400, and a magnet 500 is installed in the mounting block 250. The Hall element 400 is used to detect the position of the magnet 500, and when the position of the magnet 500 is not within the preset working range, the robotic cleaning device stops working.

[0054] In a specific embodiment, the Hall element 400 is a sensor based on the Hall effect, which can detect changes in the magnetic field. The Hall element 400 is fixedly installed on the second housing 700. The mounting block 250 has a mounting groove on the side near the lifting assembly, and the magnet 500 is installed in the mounting groove. The lifting module 200 also includes a fixed plate 251 that covers the mounting groove, and the fixed plate 251 is fixedly installed with the mounting block 250, so that the magnet 500 is in a closed space. The elastic connecting member 260 is fixedly connected with the fixed plate 251.

[0055] The preset working range is the position range of the magnet 500 set according to the normal working requirements of the robotic cleaning device. The Hall element 400 can detect the position of the magnet 500 in the mounting block 250 in real time. When the position of the magnet 500 exceeds the preset working range, it indicates that the cleaning element or the lifting device may have an abnormal situation, such as the cleaning element being stuck or the connecting spring being damaged. At this time, the Hall element 400 sends a signal to stop the work of the robotic cleaning device, avoiding further damage.

[0056] In summary, the Hall element 400 can monitor the position of the mounting block 250 in real time, discover abnormal situations in time and stop working, prevent the equipment from continuing to run in a fault state, and reduce the risk of maintenance cost and equipment damage.

[0057] As shown in Figure 3 The lifting module 200 also includes a first bearing 270 that is sleeved on the rotating cylinder 240.

[0058] In a specific embodiment, the first bearing 270 is arranged around the outside of the rotating cylinder 240, the first bearing 270 is fixedly installed on the second housing 700, and the first bearing 270 is used to maintain the stability of the rotating assembly during the lifting process. The lifting module 200 further comprises a fixed shaft 280 and a second bearing 290, the fixed shaft 280 is in a cylindrical shape, the fixed shaft 280 penetrates through the center position of the gear member 210, and the fixed shaft 280 is fixedly connected with the center position of the rotating cylinder 240. The second bearing 290 is fixedly installed on the first housing 600, and the second bearing 290 is sleeved on the fixed shaft 280, the first bearing 270 and the second bearing 290 cooperate with each other to jointly maintain the stability of the rotating assembly during the lifting process.

[0059] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings of the present application, or directly or indirectly applied to other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A lift device for a robotic vacuum cleaner, the lift device comprising: The application relates to a driving module and a lifting module. The driving module comprises a threaded rod and a threaded gear, and the threaded gear is in threaded assembly with the threaded rod. The lifting module is externally connected with a cleaning element for cleaning the ground, and the lifting module is connected with the threaded gear. When the threaded rod rotates, the lifting module has a resistance effect on the threaded gear, so that the threaded gear drives the lifting module and the cleaning element to ascend and descend along the threaded rod.

2. The lift for a robotic vacuum cleaner of claim 1, wherein, The lifting module comprises a rotating assembly, the rotating assembly comprises a first gear, the first gear is engaged with the threaded gear, the rotating assembly is connected with the cleaning element, so that the threaded gear can drive the rotating assembly and the cleaning element to rotate and clean.

3. The lift device for a robotic vacuum cleaner of claim 2, wherein, The lifting module further comprises a damping rubber ring, the damping rubber ring is fixed in position, and the damping rubber ring is sleeved on the rotating assembly.

4. The lift device for a robotic vacuum cleaner of claim 3, wherein, The damping rubber ring has a resistance effect on the rotation of the rotating assembly, so that the rotating assembly has a resistance effect on the rotation of the threaded gear.

5. The lift device for a robotic vacuum cleaner of claim 4, wherein, The rotating assembly comprises a rotating cylinder, the rotating cylinder comprises a first cylinder body and a second cylinder body, the diameter of the first cylinder body is smaller than the diameter of the second cylinder body.

6. The lift device for a robotic vacuum cleaner of claim 5, wherein, In the process that the rotating cylinder ascends and descends with the threaded gear, the damping rubber ring is in contact with the second cylinder body, at this time, the damping rubber ring has a resistance effect on the rotation of the rotating cylinder.

7. The lift device for a robotic vacuum cleaner of claim 2, wherein, When the rotating cylinder descends to the limit position with the threaded gear, the damping rubber ring is located at the first cylinder body, at this time, the damping rubber ring does not have a resistance effect on the rotation of the rotating cylinder.

8. The lift device for a robotic vacuum cleaner of claim 7, wherein, The lifting module further comprises a mounting block and an elastic connecting element, the mounting block is used for externally connecting the cleaning element, one end of the elastic connecting element is connected with the rotating assembly, and the other end of the elastic connecting element is connected with the mounting block.

9. The lift device for a robotic vacuum cleaner of claim 5, wherein, When the rotating assembly descends to the limit position, the cleaning element is in contact with the ground, so that the elastic connecting element is compressed. When the threaded gear drives the rotating assembly to ascend from the descending limit position, the rotating assembly is subjected to the elastic force of the elastic connecting element, so that the rotating cylinder ascends relative to the damping rubber ring, and then the damping rubber ring is in contact with the second cylinder body. The driving module further comprises a driving device, a second gear, a third gear and a fourth gear. The second gear and the third gear are concentrically arranged and fixedly connected, the second gear is connected with the output end of the driving device, the gear number of the second gear is greater than that of the third gear, and the fourth gear is fixedly installed on one end of the threaded rod close to the driving device. The fourth gear is engaged with the third gear. The sweeping robot lifting device further comprises a photoelectric switch. When the rotating assembly ascends to the limit position, the rotating assembly triggers the photoelectric switch, so that the driving device stops rotating. The sweeping robot lifting device further comprises a Hall element. The mounting block is provided with a magnet, and the Hall element is used for detecting the position of the magnet. When the position of the magnet is not within the preset working range, the robot lifting device stops working.

10. The lift device for a robotic vacuum cleaner of claim 4, wherein, The lifting module further comprises a first bearing, which is sleeved on the rotating cylinder.

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