Lifting mechanism and sweeper

Abstract

The lifting mechanism comprises an outer support, a rotating portion and a lifting portion, the rotating portion is rotatably connected with the outer support, the lifting portion is in threaded transmission connection with the rotating portion, the outer support is provided with a first matching portion, the lifting portion is provided with a second matching portion, and the first matching portion is provided with a first rotating shaft. And the first matching part and the second matching part are matched to limit the circumferential rotation of the lifting part. According to the lifting mechanism, the circumferential movement of the lifting part is limited by arranging the first matching part and the second matching part, the lifting part is in threaded transmission connection with the rotating part, when the rotating part rotates, axial displacement of the lifting part and the rotating part can be achieved, lifting of the lifting part is achieved, and the lifting mechanism is simple and reliable in structure and high in stability.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a lifting mechanism and a sweeping machine. Background Art

[0002] With the advancement of technology and changes in people's lifestyles, intelligent cleaning equipment has gradually entered thousands of households and become an indispensable part of people's lives. Cleaning equipment such as sweeping robots often have sweeping and mopping functions, that is, they can use side brushes and roller brushes to perform cleaning work, and they can use rag discs to perform mopping work. In the related art, the rag disc of the sweeping machine cannot be raised or lowered, and the sweeping machine will cause pollution to the carpet when it carries the rag disc on the carpet. At the same time, after the sweeping machine finishes cleaning, the cleaning parts will cause secondary pollution to the cleaned ground. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one purpose of the utility model is to provide a lifting mechanism with a simple structure and high stability.

[0004] Another object of the present invention is to provide a sweeping machine, comprising the aforementioned lifting mechanism.

[0005] According to the lifting mechanism of the embodiment of the utility model, it includes an outer bracket, a rotating part and a lifting part. The rotating part is rotatably connected to the outer bracket, and the lifting part is threadedly connected to the rotating part. The outer bracket is provided with a first matching part, and the lifting part is provided with a second matching part. The first matching part cooperates with the second matching part to limit the circumferential rotation of the lifting part.

[0006] According to the lifting mechanism of the embodiment of the utility model, the circumferential movement of the lifting part is limited by setting the first matching part and the second matching part, and the lifting part is threadedly connected to the rotating part. When the rotating part rotates, the lifting part and the rotating part can be axially displaced to realize the lifting of the lifting part. The lifting mechanism has a simple and reliable structure and high stability.

[0007] In addition, the lifting mechanism according to the above embodiment of the utility model may also have the following additional technical features:

[0008] In some embodiments, the first mating portion and the second mating portion are magnetically attracted to each other; or the first mating portion and the second mating portion are magnetically repelled to each other.

[0009] In some embodiments, the first matching part includes a plurality of parts circumferentially arranged on the outer bracket; or, the second matching part includes a plurality of parts circumferentially arranged on the lifting part, one of the first matching part and the second matching part is a magnetic part and the other is a metal part; or, the first matching part is a magnetic part and the second matching part is a magnetic part.

[0010] In some embodiments, one of the first mating portion and the second mating portion includes a guide groove, and the other includes a protrusion slidably disposed in the guide groove.

[0011] In some embodiments, the rotating portion includes a first sleeve, the lifting portion includes a second sleeve, and the first sleeve and the second sleeve are threadedly driven.

[0012] In some embodiments, the outer circumference of the first sleeve is provided with a first threaded portion, the inner circumference of the second sleeve is provided with a second threaded portion, a portion of the first sleeve is passed through the second sleeve, and the second threaded portion is threadedly matched with the first threaded portion.

[0013] In some embodiments, the lifting portion further includes a mounting portion, the mounting portion is disposed in the second sleeve, and a portion of the first sleeve is passed between the mounting portion and the second sleeve, and the mounting portion is configured with a positioning cavity with one end open for mounting a rag assembly.

[0014] In some embodiments, the lifting portion is provided with a positioning portion for magnetically engaging and installing the rag assembly.

[0015] In some embodiments, the outer support includes a third sleeve, the lifting portion includes a second sleeve, the second sleeve and the third sleeve are arranged radially, the first matching portion is provided in the third sleeve, and the second matching portion is provided in the second sleeve.

[0016] In some embodiments, at least a portion of the second sleeve is inserted into the third sleeve, the first matching portion is disposed on the outer circumference of the third sleeve, and the second matching portion is disposed on the outer circumference of the second sleeve.

[0017] The sweeping machine according to the embodiment of the utility model comprises: the aforementioned lifting mechanism, a rag assembly and a driving part; the rag assembly is installed on the lifting part; and the driving part is transmission-connected to the rotating part.

[0018] In some embodiments, the rag assembly includes a rag holder and a rag disposed on the rag holder, the rag holder is detachably mounted on the lifting portion, and the rag holder is magnetically matched with the lifting portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of the lifting structure of an embodiment of the utility model.

[0020] Figure 2 It is an exploded schematic diagram of the rotating part and the lifting part of the lifting mechanism of the embodiment of the utility model.

[0021] Figure 3 It is a schematic diagram of the lifting mechanism and the rag assembly of the embodiment of the utility model.

[0022] Figure 4 It is a schematic diagram of a sweeping machine according to an embodiment of the utility model.

[0023] Figure 5 It is a schematic cross-sectional view of a sweeping machine according to an embodiment of the utility model.

[0024] Reference numerals:

[0025] Sweeping machine 1000, lifting mechanism 100, outer bracket 10, first matching part 11, third sleeve 12, rotating part 20, first sleeve 21, first threaded part 211, lifting part 30, second matching part 31, second sleeve 32, second threaded part 321, mounting part 33, positioning cavity 331, positioning part 34, second sleeve 35, rag assembly 200, rag bracket 210, rag 220, elastic member 230, magnet 240, driving part 300. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] Combination Figure 1 According to the lifting mechanism 100 of the embodiment of the utility model, it includes an outer bracket 10, a rotating part 20 and a lifting part 30. The rotating part 20 is rotatably connected to the outer bracket 10, and the lifting part 30 is threadedly connected to the rotating part 20. Specifically, the position of the outer bracket 10 can be relatively fixed, and the rotating part 20 can rotate relative to the outer bracket 10. The outer bracket 10 can support the rotation of the rotating part 20, improve the stability of the rotating part 20 during the rotation process, and avoid the axial displacement of the rotating part 20. The lifting part 30 is threadedly connected to the rotating part 20, so that the transmission structure of the lifting part 30 and the rotating part 20 is simple and reliable, which is convenient for the lifting part 30 to rise and fall. In addition, when there is no driving force, the lifting part 30 can be locked in the corresponding position by the thread, so as to improve the structural stability of the lifting part 30.

[0028] The outer bracket 10 is provided with a first matching portion 11, and the lifting portion 30 is provided with a second matching portion 31. The first matching portion 11 and the second matching portion 31 cooperate to limit the circumferential rotation of the lifting portion 30. Specifically, when the rotating portion 20 rotates, the first matching portion 11 and the second matching portion 31 cooperate to limit the circumferential rotation of the lifting portion 30. Under the action of the thread transmission, the lifting portion 30 and the rotating portion 20 can be axially displaced, thereby realizing the lifting and lowering of the lifting portion 30. The axial direction is Figure 1 In other words, the lifting unit 30 can be moved along the AA direction shown in FIG. Figure 1 The AA direction in ascending and descending.

[0029] According to the lifting mechanism 100 of the embodiment of the utility model, the circumferential movement of the lifting part 30 is limited by setting the first matching part 11 and the second matching part 31, and the lifting part 30 is threadedly connected to the rotating part 20. When the rotating part 20 rotates, the lifting part 30 and the rotating part 20 can be axially displaced to realize the lifting and lowering of the lifting part 30. The lifting mechanism 100 has a simple and reliable structure and high stability.

[0030] The lifting mechanism 100 of the embodiment of the utility model can be applied to household appliances to drive the lifting of components. For example, it can be applied to a sweeping machine 1000. The lifting mechanism 100 can be connected to a rag 220. When the lifting mechanism 100 is lifted or lowered, it can drive the rag 220 to automatically lift or lower. In different usage scenarios, the lifting mechanism 100 can be used to drive the rag 220 to lift or lower, thereby improving the automation level of the sweeping machine 1000 and simplifying the user's operation.

[0031] It should be noted that the first matching portion and the second matching portion are used to limit the circumferential rotation of the lifting portion. The "limiting rotation" here does not mean prohibiting rotation or relative stillness. Limiting rotation can include completely preventing rotation and also includes hindering rotation.

[0032] Among them, the rotation of the rotating part 20 realizes axial displacement between the lifting part 30 and the rotating part 20. The rotating part 20 can rotate clockwise or counterclockwise. When the rotating part 20 rotates in the clockwise direction, the lifting part 30 can be driven to rise. When the rotating part 20 rotates in the counterclockwise direction, the lifting part 30 can be driven to descend.

[0033] In addition, the first matching portion 11 and the second matching portion 31 can be set to different structures. For example, one of the first matching portion 11 and the second matching portion 31 may include a guide groove, and the other includes a convex portion slidably arranged in the guide groove. When the rotating portion 20 rotates, the convex portion slides in the guide groove to limit the circumferential movement of the lifting portion 20, thereby realizing that when the rotating portion 20 rotates, the lifting portion 30 is driven to move up or down. For another example, the first matching portion 11 and the second matching portion 31 can be magnetically matched, such as the first matching portion 11 and the second matching portion 31 can be magnetically attracted to each other. When the rotating portion 20 rotates, the lifting portion 30 is restricted from rotating by the obstruction of the magnetic force, thereby causing the lifting portion 30 and the rotating portion 20 to undergo axial displacement, realizing the rotation of the rotating portion 20 and driving the lifting portion 30 to move up and down.

[0034] In some embodiments of the utility model, the first matching portion 11 and the second matching portion 31 are magnetically attracted to each other. When the rotating portion 20 rotates, the lifting portion 30 will be hindered from rotating by the force of the magnetic field. Since the position of the rotating portion 20 in the axial direction is fixed, the lifting portion 30 and the rotating portion 20 are axially displaced, thereby realizing the rotation of the rotating portion 20 and driving the lifting portion 30 to be lifted and lowered. By setting the first matching portion 11 and the second matching portion 31 to be magnetically attracted to each other, the installation and maintenance of the lifting mechanism 100 are facilitated.

[0035] The magnetic attraction between the first matching part 11 and the second matching part 31 can be set in different forms. For example, one of the first matching part 11 and the second matching part 31 is a magnetic part and the other is a metal part. Specifically, the first matching part 11 can be a magnetic part and the second matching part 31 can be a metal part, or the first matching part 11 is a metal part and the second matching part 31 is a magnetic part. For another example, the first matching part 11 and the second matching part 31 can both be magnetic parts, and different magnetic poles of the first matching part 11 and the second matching part 31 are arranged relative to each other, or the magnetic pole of the first matching part 11 is the S pole and the magnetic pole of the second matching part 31 is the N pole, thereby realizing the magnetic attraction between the first matching part 11 and the second matching part 31.

[0036] In some embodiments of the present invention, the first matching portion 11 and the second matching portion 31 repel each other magnetically. When the rotating portion 20 rotates, the lifting portion 30 will be hindered from rotating by the force of the magnetic field. Since the position of the rotating portion 20 in the axial direction is fixed, the lifting portion 30 and the rotating portion 20 are axially displaced, thereby realizing the rotation of the rotating portion 20 and driving the lifting portion 30 to be lifted and lowered. By setting the first matching portion 11 and the second matching portion 31 to repel each other magnetically, the installation and maintenance of the lifting structure are facilitated.

[0037] The first matching portion 11 and the second matching portion 31 magnetically repel each other. The first matching portion 11 and the second matching portion 31 may both be magnetic members. Exemplarily, the same magnetic poles of the first matching portion 11 and the second matching portion 31 may be arranged opposite to each other.

[0038] In some embodiments of the present invention, the first matching portion 11 may include a plurality of first matching portions 11 disposed circumferentially on the outer bracket 10.

[0039] The second matching portion 31 may also include a plurality of first matching portions 11 and a plurality of second matching portions 12 arranged circumferentially on the lifting portion 30 . The cooperation between the plurality of first matching portions 11 and the plurality of second matching portions 12 can enhance the strength of the magnetic field, thereby effectively limiting the circumferential rotation of the lifting portion 30 and enhancing the movement stability of the lifting portion 30 .

[0040] For example, a plurality of first matching portions 11 may be arranged at intervals on the outer circumferential surface of the outer bracket 10 , and a plurality of second matching portions 31 may be arranged at intervals on the outer circumferential surface of the lifting portion 30 .

[0041] In some embodiments of the present invention, one of the first matching portion 11 and the second matching portion 31 includes a guide groove, and the other includes a protrusion slidably disposed in the guide groove. Specifically, the first matching portion 11 may include a guide groove, and the second matching portion 31 includes a protrusion slidably disposed in the guide groove, or the second matching portion 31 includes a guide groove, and the first matching portion 11 includes a protrusion slidably disposed in the guide groove. When the rotating portion 20 rotates, the protrusion slides in the guide groove to limit the circumferential rotation of the lifting portion 30, thereby causing the lifting portion 30 and the rotating portion 20 to produce axial displacement, thereby realizing the lifting and lowering of the lifting portion 30.

[0042] Combination Figure 1 and Figure 2 In some embodiments of the utility model, the rotating part 20 includes a first sleeve 21, the lifting part 30 includes a second sleeve 32, and the first sleeve 21 and the second sleeve 32 are threadedly driven. By setting the first sleeve 21 and the second sleeve 32 for threaded transmission, the structure of the lifting mechanism 100 is made compact and the occupied space is reduced.

[0043] Furthermore, a first threaded portion 211 is provided on the outer circumference of the first sleeve 21, and a second threaded portion 321 is provided on the inner circumference of the second sleeve 32. A portion of the first sleeve 21 is inserted into the second sleeve 32, and the second threaded portion 321 and the first threaded portion 211 are threadedly matched. Specifically, the rotating portion 20 is rotatably connected to the outer bracket 10, and the relative position of the outer bracket 10 is fixed. In other words, the rotating portion 20 is fixed in the axial direction. When the rotating portion 20 rotates, it drives the first sleeve 21 to rotate. The second sleeve 32 is restricted from rotating under the cooperation of the first matching portion 11 and the second matching portion 31, thereby causing the first sleeve 21 and the second sleeve 32 to undergo axial displacement. When the first sleeve 21 rotates in a clockwise direction, it can drive the second sleeve 32 to rise. When the first sleeve 21 rotates in a counterclockwise direction, it can drive the second sleeve 32 to descend, thereby realizing the lifting movement of the lifting portion 30. Among them, the second sleeve 32 can position the first sleeve 21, and the threaded transmission connection structure is simple and reliable, which improves the structural stability of the rotating part 20. A part of the first sleeve 21 is inserted into the second sleeve 32, and the other part can be exposed, which is convenient for the first sleeve 21 to be connected with the external bracket 10 and the external drive structure.

[0044] Among them, combined Figure 1 and Figure 2 The lifting part 30 may further include a mounting part 33, which is disposed in the second sleeve 32, so that the structure of the lifting part 30 is compact and the space utilization is improved, and a part of the first sleeve 21 is passed through the mounting part 33 and the second sleeve 32. The mounting part 33 and the second sleeve 32 cooperate to limit the first sleeve 21 and improve the structural stability of the first sleeve 21.

[0045] Combination Figure 2 and Figure 3 The mounting portion 33 is constructed with a positioning cavity 331 with one end open for mounting the rag assembly 200. Specifically, the lifting mechanism 100 of the utility model embodiment can be applied to the sweeping machine 1000, and the rag assembly 200 can be mounted on the lifting portion 30. The lifting portion 30 can drive the rag assembly 200 to rise and fall during the lifting process. Specifically, when the rag assembly 200 is needed, the lifting portion 30 descends and drives the rag assembly 200 to descend, which is convenient for using the rag assembly 200 to perform mopping work. When the rag assembly 200 is not needed, the lifting portion 30 rises and drives the rag assembly 200 to rise, which is convenient for storing the rag assembly 200 in the sweeping machine 1000 to avoid secondary pollution to the carpet or the cleaned floor.

[0046] Combination Figure 2 and Figure 3In some embodiments of the present invention, the lifting portion 30 is provided with a positioning portion 34 for magnetically fitting and installing the rag assembly 200, which facilitates the installation and maintenance of the rag assembly 200 and the lifting portion 30 and improves the installation efficiency of the rag assembly 200 and the lifting portion 30.

[0047] Specifically, the positioning part 34 can be a metal part, and a magnet 240 is provided on the rag assembly 200. The metal part and the magnet 240 are magnetically attracted to each other, so that the rag assembly 200 is positioned and connected to the lifting part 30, so that the rag assembly 200 can avoid obstacles or uneven working surfaces when passing through them, thereby improving the working stability of the sweeping machine 1000 and making the connection structure between the rag assembly 200 and the lifting part 30 stable and reliable.

[0048] Combination Figure 3 In some embodiments of the present invention, the outer bracket 10 includes a third sleeve 12, the lifting part 30 includes a second sleeve 35, the second sleeve 35 and the third sleeve 12 are arranged radially, the first matching part 11 is provided on the third sleeve 12, and the second matching part 31 is provided on the second sleeve 35. By providing the sleeve, the lifting mechanism 100 has a compact structure and improves space utilization.

[0049] Among them, the first matching part 11 and the second matching part 31 can be set to different structures and set at different positions. For example, the first matching part 11 can be a guide groove, and the second matching part 31 is a convex part slidably arranged on the guide groove. The first matching part 11 can be arranged on the inner circumferential surface of the third sleeve 12, and the second matching part 31 can be arranged on the outer circumferential surface of the second sleeve 35. The convex part slides in the guide groove, thereby limiting the circumferential movement of the lifting part 30. When the rotating part 20 rotates, it can drive the lifting part 30 and the rotating part 20 to undergo axial displacement, thereby realizing the lifting and lowering of the lifting part 30.

[0050] In some embodiments of the utility model, at least a portion of the second sleeve 35 is inserted into the third sleeve 12, so that the structure of the lifting mechanism 100 is compact and the space utilization is improved. The first matching portion 11 is arranged on the outer circumferential surface of the third sleeve 12, and the second matching portion 31 is arranged on the outer circumferential surface of the second sleeve 35.

[0051] Among them, the first matching part 11 and the second matching part 31 can be magnetically attracted or magnetically repelled. Specifically, the first matching part 11 can be a lifting outer magnet, and the second matching part 31 can be a lifting inner magnet. The lifting inner magnet is fixed to the outer surface of the second sleeve 32. When the first sleeve 21 rotates, the second sleeve 32 is restricted from rotating due to the obstruction of the circumferential magnetic force. That is, under the action of the lifting outer magnet and the lifting inner magnet, the second sleeve 32 is restricted from rotating circumferentially, so that the second sleeve 32 and the first sleeve 21 produce axial displacement.

[0052] Combination Figure 4and Figure 5 According to the embodiment of the utility model, the sweeping machine 1000 includes the aforementioned lifting mechanism 100, the rag assembly 200 and the driving unit 300. The rag assembly 200 is installed on the lifting unit 30, and the driving unit 300 is connected to the rotating unit 20. Specifically, the driving unit 300 can drive the rotating unit 20 to rotate, and the driving unit 300 can rotate forward and reverse. For example, when the driving unit 300 rotates forward, it can drive the rotating unit 20 to rotate in a clockwise direction, drive the lifting unit 30 to rise, and then drive the rag assembly 200 to rise and leave the working surface. When the driving unit 300 rotates reversely, it can drive the rotating unit 20 to rotate in a counterclockwise direction, drive the lifting unit 30 to descend, and then drive the rag assembly 200 to descend and perform mopping work. By setting up a lifting mechanism 100 to drive the mop assembly 200 to automatically rise and fall, the sweeping machine 1000 can adapt to different usage scenarios. In the vacuuming mode, the mop assembly can be stored through the lifting mechanism 100 to prevent the mop assembly from affecting the cleaning efficiency and causing secondary pollution to the ground. In the mopping and washing mode, the mop assembly can be lowered through the lifting mechanism 100 to perform mopping work, thereby improving the degree of automation of the sweeping machine 1000, simplifying user operations, and improving user experience.

[0053] Among them, combined Figure 3 The rag assembly 200 may include a rag bracket 210 and a rag 220 arranged on the rag bracket 210. The rag bracket 210 can be detachably installed on the lifting part 30, and the rag bracket 210 and the lifting part 30 are magnetically matched, so that the connection structure between the rag bracket 210 and the lifting part 30 is simple and convenient for cleaning and replacement of the rag assembly 200.

[0054] In addition, the rag 220 and the rag holder 210 may be fixedly connected to improve the structural strength of the rag assembly 200 . Of course, the rag 220 and the rag holder 210 may also be detachably connected to facilitate replacement and cleaning of the rag 220 .

[0055] Optionally, an elastic member 230 may be provided between the magnet 240 and the rag 220 , so that the rag 220 can avoid obstacles or uneven working surfaces when passing through, thereby improving the working stability of the sweeping machine 1000 .

[0056] Optionally, the sweeping machine 1000 may include a double turntable structure, that is, it includes two rag assemblies 200, and the two rag assemblies 200 are located at the rear end of the moving direction of the sweeping machine 1000, and the rag assemblies 200 and the lifting mechanism 100 are arranged correspondingly. In other words, the sweeping machine 1000 may include two lifting mechanisms 100. Under the action of the lifting mechanism 100, the sweeping machine 1000 can autonomously control each rag assembly 200 to switch between any state of the mopping state and the lifting state, thereby improving the degree of automation of the sweeping machine 1000 and improving the user experience.

[0057] In the description of the present invention, it is necessary to understand that the terms "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0059] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0062] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A lifting mechanism (100), characterized in that: The invention comprises an outer bracket (10), a rotating part (20) and a lifting part (30), wherein the rotating part (20) is rotatably connected to the outer bracket (10), and the lifting part (30) is threadedly connected to the rotating part (20). The outer bracket (10) is provided with a first matching portion (11), and the lifting portion (30) is provided with a second matching portion (31), and the first matching portion (11) and the second matching portion (31) cooperate to limit the circumferential rotation of the lifting portion (30).

2. The lifting mechanism (100) according to claim 1, characterized in that: The first matching portion (11) and the second matching portion (31) are magnetically attracted to each other; or the first matching portion (11) and the second matching portion (31) are magnetically repelled from each other.

3. The lifting mechanism (100) according to claim 2, characterized in that: The first matching portion (11) includes a plurality of portions circumferentially arranged on the outer bracket (10), and the second matching portion (31) includes a plurality of portions circumferentially arranged on the lifting portion (30); or, one of the first matching portion (11) and the second matching portion (31) is a magnetic part and the other is a metal part; or, the first matching portion (11) is a magnetic part and the second matching portion (31) is a magnetic part.

4. The lifting mechanism (100) according to claim 1, characterized in that: One of the first matching portion (11) and the second matching portion (31) includes a guide groove, and the other includes a protrusion slidably arranged in the guide groove.

5. The lifting mechanism (100) according to claim 1, characterized in that: The rotating part (20) comprises a first shaft sleeve (21), the lifting part (30) comprises a second shaft sleeve (32), and the first shaft sleeve (21) and the second shaft sleeve (32) are threadedly driven.

6. The lifting mechanism (100) according to claim 5, characterized in that: The outer circumferential surface of the first sleeve (21) is provided with a first threaded portion (211), the inner circumferential surface of the second sleeve (32) is provided with a second threaded portion (321), a portion of the first sleeve (21) is inserted into the second sleeve (32), and the second threaded portion (321) and the first threaded portion (211) are threadedly matched.

7. The lifting mechanism (100) according to claim 6, characterized in that: The lifting portion (30) further comprises a mounting portion (33), wherein the mounting portion (33) is disposed in the second shaft sleeve (32), and a portion of the first shaft sleeve (21) is passed through the mounting portion (33) and the second shaft sleeve (32), and the mounting portion (33) is configured with a positioning cavity (331) with one end open for mounting the rag assembly (200).

8. The lifting mechanism (100) according to claim 1, characterized in that: The lifting portion (30) is provided with a positioning portion (34) for magnetically engaging and installing the rag assembly (200).

9. The lifting mechanism (100) according to any one of claims 1 to 8, characterized in that: The outer bracket (10) comprises a third sleeve (12), the lifting portion (30) comprises a second sleeve (35), the second sleeve (35) and the third sleeve (12) are arranged radially, the first matching portion (11) is provided on the third sleeve (12), and the second matching portion (31) is provided on the second sleeve (35).

10. The lifting mechanism (100) according to claim 9, characterized in that: At least a portion of the second sleeve (35) is inserted into the third sleeve (12), the first matching portion (11) is arranged on the outer peripheral surface of the third sleeve (12), and the second matching portion (31) is arranged on the outer peripheral surface of the second sleeve (35).

11. A sweeping machine (1000), characterized in that: include: The lifting mechanism (100) according to any one of claims 1 to 10; A rag assembly (200), wherein the rag assembly (200) is mounted on the lifting portion (30); A driving part (300), wherein the driving part (300) is transmission-connected to the rotating part (20).

12. The sweeping machine (1000) according to claim 11, characterized in that: The rag assembly (200) comprises a rag bracket (210) and a rag (220) arranged on the rag bracket (210); the rag bracket (210) is detachably mounted on the lifting part (30), and the rag bracket (210) is magnetically matched with the lifting part (30).

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