Floor sweeping robot lifting device

Abstract

The invention 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] This application relates to the technical field of floor cleaning robots, and particularly to a lifting device for a floor cleaning robot. Background Art

[0002] A floor cleaning robot is a modern smart home device and has become an important household chore assistant for many families. Relying on advanced navigation technology, intelligent algorithms, and an efficient cleaning system, the floor cleaning robot provides great convenience for users in their busy daily lives. With the continuous development of technology, the floor cleaning robot will become more intelligent and multifunctional, further improving the efficiency of household cleaning and the user experience.

[0003] Generally, a floor cleaning robot is provided with a cleaning component for cleaning the ground. The traditional floor cleaning robot generally drives the cleaning component to lift through a telescopic mechanism, and it is difficult for the telescopic mechanism to meet the requirement that the floor cleaning robot needs to have different lifting speeds for the cleaning component under different circumstances. Summary of the Invention

[0004] The lifting device for a floor cleaning robot provided by this application aims to solve the problem that the traditional floor cleaning robot generally drives the cleaning component to lift through a telescopic mechanism, and it is difficult for the telescopic mechanism to meet the requirement that the floor cleaning robot needs to have different lifting speeds for the cleaning component under different circumstances.

[0005] To solve the above technical problems, this application proposes a lifting device for a floor cleaning robot. The lifting device for a floor cleaning robot includes: a driving module and a lifting module;

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

[0007] The lifting module is externally connected to a cleaning component for cleaning the ground. The lifting module is connected to 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 component to rise and fall along the threaded rod.

[0008] Further, the lifting module includes a rotating component. The rotating component includes a first gear, and the first gear meshes with the threaded gear. The rotating component is connected to the cleaning component, so that the threaded gear can drive the rotating component and the cleaning component to perform rotary cleaning.

[0009] Further, the lifting module further includes a damping rubber ring. The position of the damping rubber ring is fixed, and the damping rubber ring is sleeved on the rotating component. The damping rubber ring 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.

[0010] Furthermore, the rotating assembly includes a rotating cylinder, which includes a first cylinder body and a second cylinder body. The diameter of the first cylinder body is smaller than that of the second cylinder body. During the process of the rotating cylinder ascending and descending with the threaded gear, the damping rubber ring contacts 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 descends to the limit position with the threaded gear, the damping rubber ring is located at the first cylinder body, and at this time, the damping rubber ring has no resistance effect on the rotation of the rotating cylinder.

[0011] Furthermore, the lifting module further includes 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 to the rotating assembly and the other end of the elastic connecting piece is connected to the mounting block. When the rotating assembly descends to the limit position, the cleaning piece contacts the ground, causing the elastic connecting piece to be compressed.

[0012] Furthermore, when the threaded gear drives the rotating assembly to ascend from the limit position of descending, the rotating assembly is subjected to the elastic force of the elastic connecting piece, causing the rotating cylinder to ascend relative to the damping rubber ring, and further causing the damping rubber ring to contact the second cylinder body.

[0013] Furthermore, the driving module further includes 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 to the output end of the driving device. The number of teeth of the second gear is greater than that of the third gear. The fourth gear is fixedly installed at one end of the threaded rod close to the driving device, and the fourth gear meshes with the third gear.

[0014] Furthermore, the lifting device of the sweeping robot further includes a photoelectric switch. When the rotating assembly ascends to the limit position, the rotating assembly will trigger the photoelectric switch, causing the driving device to stop rotating.

[0015] Furthermore, the lifting device of the sweeping robot further includes a Hall element. A magnet is provided in the mounting block. The Hall element is used to detect the position of the magnet. When the position of the magnet is not within the preset working range, the lifting device of the robot stops working.

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

[0017] The beneficial effects of this application are as follows: In the floor sweeping robot lifting device provided in this application, the floor sweeping robot lifting device includes a driving module and a lifting module. The driving module includes a threaded rod and a threaded gear. The threaded gear is threadedly assembled with the threaded rod. The lifting module is externally connected to a cleaning member for cleaning the ground, and the lifting module is connected to the threaded gear. When the threaded rod rotates, the lifting module has a resistance effect on the threaded gear, causing the threaded gear to drive the lifting module and the cleaning member to rise and fall along the threaded rod. By adjusting the rotation speed of the threaded rod, the lifting speed of the cleaning member driven by the threaded gear can be adjusted, meeting the requirement that the floor sweeping robot needs to have different lifting speeds for the cleaning member under different circumstances. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0019] Figure 1 is a schematic perspective view of the floor sweeping robot lifting device according to an embodiment of the present invention;

[0020] Figure 2 is a schematic perspective view of the floor sweeping robot lifting device according to an embodiment of the present invention after removing the first housing and the second housing;

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

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

[0023] Description of the 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 member; 211, first gear; 212, baffle; 220, gasket; 230, damping rubber ring; 240, rotating cylinder; 241, first cylinder; 242, second cylinder; 250, mounting block; 251, fixing plate; 260, elastic connecting member; 270, first bearing; 280, fixed shaft; 290, second bearing; 300, photoelectric switch; 400, Hall element; 500, magnet; 600, first housing; 700, second housing. DETAILED DESCRIPTION OF THE EMBODIMENTS

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

[0025] Those skilled in the art of the present technology can understand that, unless specifically stated otherwise, the singular forms "a", "an", "the above" and "the" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of the present application means the presence of features, integers, steps, operations, elements, modules, modules and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, modules, components and / or their groups. 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 other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any one of the modules and all combinations of one or more related listed items.

[0026] Those skilled in the art of the present technology can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of those of ordinary skill 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 a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as here.

[0027] As Figure 2 shown, the present application provides a lifting device for a floor cleaning robot. The lifting device for the floor cleaning robot includes a driving module 100 and a lifting module 200. The driving module 100 includes a threaded rod 110 and a threaded gear 120. The threaded gear 120 is threadedly assembled with the threaded rod 110. The lifting module 200 is externally connected to a cleaning member for cleaning the floor. The lifting module 200 is connected to 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 member to move up and down along the threaded rod 110.

[0028] In a specific embodiment, the driving module 100 is the power source of the entire lifting device and is mainly responsible for providing the power to lift the cleaning component. Among them, the threaded rod 110 is a rod-shaped component with threads. When the threaded rod 110 rotates, it can convert the rotational motion into the linear motion of the threaded gear 120. The threaded gear 120 is a gear that cooperates with the threaded rod 110. It has threads adapted to the threaded rod 110 at its central position. 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 component and the driving module 100. The lifting module 200 is connected to 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 rising and falling of the cleaning component. Here, the cleaning component can be the brush, mop of a floor sweeping robot or other components for cleaning the ground. 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 rotate idly with the threaded rod 110 and cannot realize the lifting function. For example, in practical applications, 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 component to rise; conversely, when the threaded rod 110 rotates counterclockwise, the threaded gear 120 will drive the cleaning component to descend.

[0030] In summary, through the simple cooperation of the threaded rod 110 and the threaded gear 120, the lifting function of the cleaning component is realized. The structure is simple, which reduces the production cost. Secondly, the reliability of this structure is high, and it can stably realize the lifting operation of the cleaning component, avoiding the fault problems that may be brought by complex structures. In addition, by controlling the rotation speed of the threaded rod 110, the lifting speed of the cleaning component can be accurately controlled, improving the cleaning adaptability and flexibility of the floor sweeping robot and better meeting the cleaning scene requirements of different scenarios.

[0031] As Figure 3 shown, the lifting module 200 includes a rotating assembly. The rotating assembly includes a first gear 211. The first gear 211 meshes with the threaded gear 120. The rotating assembly is connected to the cleaning component, so that the threaded gear 120 can drive the rotating assembly and the cleaning component to perform rotary cleaning.

[0032] In a specific embodiment, the rotating assembly is an important part of the lifting module 200, and its main function is to drive the cleaning member to rotate. The rotating assembly includes a gear member 210, and a first gear 211 is provided around the outer periphery of the gear member 210. The first gear 211 meshes with the threaded gear 120, so that the threaded gear 120 can drive the gear member 210 to rotate. Since the rotating assembly is connected to the cleaning member, the cleaning member will also rotate with the rotating assembly to achieve the function of rotary cleaning. Moreover, a baffle 212 is provided around the outer periphery of the gear member 210. The baffle 212 is provided above the first gear 211. The rotating assembly further includes a gasket 220. The gasket 220 is sleeved on the gear member 210. The gasket 220 is located below the first gear 211. The baffle 212 and the gasket 220 clamp the threaded gear 120 and the first gear 211, so that the threaded gear 120 can drive the gear member 210 to move along the threaded rod 110.

[0033] In summary, this way of realizing rotary cleaning through gear transmission has a compact structure, high transmission efficiency, can make full use of the power of the drive module 100, reduce energy loss, and improve the overall performance of the sweeping robot.

[0034] As Figure 1 and Figure 3 shown, the lifting module 200 further includes a damping rubber ring 230. The position of the damping rubber ring 230 is fixed, and the damping rubber ring 230 is sleeved on the rotating assembly. The damping rubber ring 230 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 120.

[0035] In a 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 joined together to form a space for accommodating the drive module 100 and the lifting. The lifting module 200 includes a damping rubber ring 230. The damping rubber ring 230 is generally annular. The damping rubber ring 230 is a rubber ring with elastic and damping characteristics. The damping rubber ring 230 is fixedly installed in the second housing 700. The damping rubber ring 230 surrounds the outside of the rotating assembly and can be in close contact with the rotating assembly. The damping rubber ring 230 will generate a certain frictional force when the rotating assembly rotates, hindering the rotation of the rotating assembly.

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

[0037] As Figure 4As shown, the rotating assembly includes a rotating cylinder 240. The rotating cylinder 240 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 process of the rotating cylinder 240 rising and falling with the threaded gear 120, the damping rubber ring 230 contacts 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 descends to the limit position 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 has no resistance effect on the rotation of the rotating cylinder 240.

[0038] In a specific embodiment, the rotating cylinder 240 is integrally cylindrical. The rotating cylinder 240 is composed of a first cylinder body 241 and a 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. The gasket 220 is fixedly assembled with one end of the first cylinder body 241 close to the first gear 211. During the process of the rotating cylinder 240 rising and falling with the threaded gear 120, the damping rubber ring 230 is located at the position of the second cylinder body 242. The damping rubber ring 230 is in close contact with the second cylinder body 242, generating a large frictional 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 descends to the limit position, the damping rubber ring 230 is located at the first cylinder body 241. 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 has no resistance effect on the rotation of the rotating cylinder 240, so that the threaded gear 120 can drive the rotating cylinder 240 and the cleaning member to rotate freely to complete the cleaning operation.

[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, and thus the resistance of the damping rubber ring 230 to the rotating cylinder 240 can change. During the rising and falling process, the existence of the resistance ensures the stability of the rising and falling process; during the cleaning process, removing the resistance can reduce energy consumption and improve the cleaning efficiency. This dynamic adjustment method fully considers the actual working requirements of the sweeping robot and improves the practicability of the entire lifting device.

[0040] As Figure 4 shown, 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 to the rotating assembly and the other end of the elastic connecting member 260 is connected to the mounting block 250. When the rotating assembly descends to the limit position, the cleaning member contacts the ground, causing the elastic connecting member 260 to be compressed.

[0041] In a specific embodiment, the mounting block 250 is generally a hexagonal cylinder. The mounting block 250 is a component for mounting the cleaning part, which provides a fixed connection point for the cleaning part. The elastic connecting piece 260 is an elastic component, and its two ends are respectively connected to the rotating assembly and the mounting block 250, playing a role of connection and buffering. In this embodiment, the elastic connecting piece 260 is a spring. During the descent of the rotating assembly, when the cleaning part contacts the ground, due to the obstruction of the ground, the cleaning part cannot continue to descend, while the rotating assembly is still descending. At this time, the elastic connecting piece 260 will be compressed. Through the elastic action of the elastic connecting piece 260, the cleaning part can better fit the ground, ensuring the cleaning effect. At the same time, the elasticity of the elastic connecting piece 260 can also buffer the impact force between the cleaning part and the ground, reducing the damage to the cleaning part and the sweeping robot.

[0042] In summary, the setting of the elastic connecting piece 260 enables the cleaning part to better adapt to different ground conditions. Whether it is a flat ground or a ground with certain undulations, the cleaning part can closely fit the ground for cleaning, improving the thoroughness of cleaning. In addition, the buffering effect of the elastic connecting piece 260 can extend the service life of the cleaning part and the sweeping robot, reducing the damage caused by excessive impact force.

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

[0044] In a specific embodiment, when the rotating assembly is at the lower limit position, the elastic connecting piece 260 is in a compressed state. And because the threaded gear 120 still has a downward movement tendency when it descends to the limit position, the elastic connecting piece 260 cannot expand, which will cause the elastic connecting piece 260 to store a certain amount of elastic potential energy. When the threaded rod 110 rotates in the reverse direction, the threaded gear 120 has an upward movement tendency. At this time, the elastic connecting piece 260 will release the elastic potential energy and generate an elastic force. This elastic force acts on the rotating assembly, causing the rotating cylinder 240 to rise slightly relative to the damping rubber ring 230 at the fixed position. As a result, the damping rubber ring 230 originally located at the first cylinder 241 will contact the second cylinder 242 again, thereby restoring the resistance effect of the damping rubber ring 230 on the rotating cylinder 240, and further restoring the resistance effect of the lifting module 200 on 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 piece 260 enables the rotating cylinder 240 to automatically adjust its position, making the damping rubber ring 230 play its role again, ensuring the smooth switching of the sweeping robot lifting device between different working states.

[0046] As Figure 2 shown, the driving module 100 further includes 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 to the output end of the driving device 130. The number of teeth 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 meshes 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, which provides rotational power. The second gear 140 and the third gear 150 are concentrically arranged and integrally formed. The number of teeth 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 meshes 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 meshes with the third gear 150. After the driving device 130 is started, it drives the second gear 140 to rotate. Since the second gear 140 and the third gear 150 are integrally formed, the third gear 150 also rotates accordingly. Since the number of teeth of the second gear 140 is greater than that of the third gear 150, the effect of speed reduction is achieved. The rotation of the third gear 150 is transmitted to the threaded rod 110 through the meshing with the fourth gear 160, causing the threaded rod 110 to rotate, and then driving the threaded gear 120 and the lifting module 200 to move.

[0048] In summary, through the way of gear transmission, the rotational speed and torque can be adjusted according to actual needs, improving the efficiency and stability of power transmission. The setting of the speed reduction mechanism can enable the driving device 130 to output a larger torque at a lower rotational speed, avoiding the overload operation of the motor and extending the service life of the motor.

[0049] As Figure 1 shown, the lifting device of the sweeping robot further includes a photoelectric switch 300. When the rotating assembly rises to the limit position, the rotating assembly will trigger the photoelectric switch 300, causing the driving device 130 to stop 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 that uses the emission and reception of light to detect the position of an object. When the rotating assembly rises to the limit position, the top of the gear member 210 will block the light emitted by the photoelectric switch 300, thereby triggering the photoelectric switch 300.

[0051] After the photoelectric switch 300 is triggered, it sends a signal to the driving device 130 to stop the driving device 130 from rotating, avoiding damage caused by the continuous rising of the rotating assembly.

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

[0053] As Figure 1 and Figure 4 shown, the lifting device of the floor cleaning robot further includes a Hall element 400. A magnet 500 is provided in the mounting block 250. The Hall element 400 is used to detect the position of the magnet 500. When the position of the magnet 500 is not within the preset working range, the robot lifting device stops working.

[0054] In a specific embodiment, the Hall element 400 is a sensor based on the Hall effect. It can detect changes in the magnetic field. The Hall element 400 is fixedly installed on the second housing 700. An installation groove is provided on one side of the mounting block 250 close to the lifting assembly. The magnet 500 is arranged in the installation groove. The lifting module 200 further includes a fixing plate 251. The fixing plate 251 covers the installation groove, and the fixing 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 to the fixing plate 251.

[0055] The preset working range is the position range of the magnet 500 set according to the normal working requirements of the floor cleaning robot. The Hall element 400 will 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 there may be an abnormal situation with the cleaning part or the lifting device, such as the cleaning part being stuck, the connecting spring being damaged, etc. At this time, the Hall element 400 will send a signal to stop the working of the floor cleaning robot lifting device to avoid further damage.

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

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

[0058] In a specific embodiment, the first bearing 270 surrounds the outside of the rotating cylinder 240. The first bearing 270 is fixedly installed on the second housing 700 and is used to maintain the stability of the rotating assembly during the lifting process. The lifting module 200 further includes a fixed shaft 280 and a second bearing 290. The fixed shaft 280 is cylindrical. The fixed shaft 280 passes through the center position of the gear member 210, and the fixed shaft 280 is fixedly connected to the center position of the rotating cylinder 240. The second bearing 290 is fixedly installed on the first housing 600 and 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 are only the preferred embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present application.

Claims

1. A sweeping robot lifting device, characterized in that: include: Drive module and lifting module; The driving module comprises a threaded rod and a threaded gear, and the threaded gear is threadedly assembled with the threaded rod; The lifting module is externally connected to a cleaning piece for cleaning the floor, and the lifting module is connected to 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 rise and fall along the threaded rod.

2. The sweeping robot lifting device according to claim 1, characterized in that: The lifting module includes a rotating assembly, and the rotating assembly includes a first gear, the first gear is meshed with the threaded gear, and the rotating assembly is connected to the cleaning member, so that the threaded gear can drive the rotating assembly and the cleaning member to perform rotational cleaning.

3. The sweeping robot lifting device according to claim 2, characterized in that: The lifting module also includes a damping rubber ring, the position of which is fixed, and the damping rubber ring is sleeved on the rotating component. The damping rubber ring 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.

4. The sweeping robot lifting device according to claim 3, characterized in that: The rotating assembly includes a rotating cylinder, and the rotating cylinder includes 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. When the rotating cylinder rises and falls with the threaded gear, the damping rubber ring contacts 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 descends to the extreme position with the threaded 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.

5. The sweeping robot lifting device according to claim 4, characterized in that: The lifting module also includes a mounting block and an elastic connecting piece, wherein the mounting block is used to externally connect the cleaning piece, one end of the elastic connecting piece is connected to the rotating assembly and the other end of the elastic connecting piece is connected to the mounting block, and when the rotating assembly descends to the extreme position, the cleaning piece contacts the ground, causing the elastic connecting piece to be compressed.

6. The sweeping robot lifting device according to claim 5, characterized in that: When the threaded gear drives the rotating assembly to rise from the lowered limit position, the rotating assembly is subjected to the elastic force of the elastic connector, so that the rotating cylinder rises relative to the damping rubber ring, thereby causing the damping rubber ring to contact the second cylinder.

7. The sweeping robot lifting device according to claim 1, characterized in that: The driving module also includes 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 to the output end of the driving device. The number of gears of the second gear is greater than the number of gears of the third gear. The fourth gear is fixedly installed on one end of the threaded rod close to the driving device, and the fourth gear is meshed with the third gear.

8. The lifting device of the sweeping robot according to claim 7, characterized in that: The lifting device of the sweeping robot also includes a photoelectric switch. When the rotating component rises to the limit position, the rotating component triggers the photoelectric switch to stop the driving device from rotating.

9. The sweeping robot lifting device according to claim 5, characterized in that: The sweeping robot lifting device also includes a Hall element. A magnet is provided in the mounting block. The Hall element is used to detect the position of the magnet. When the position of the magnet is not within a preset working range, the robot lifting device stops working.

10. The lifting device of the sweeping robot according to claim 4, characterized in that: The lifting module further includes a first bearing, and the first bearing is sleeved on the rotating cylinder.

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