Roller device and sweeper

Abstract

The utility model relates to the technical field of ground cleaning, and provides a roller device and a sweeper. The rotating sleeve is rotationally mounted on the shell in the first direction; the mounting frame is mounted on the shell in a guiding manner in the first direction, the mounting frame is connected with the rotating sleeve, and the rotating sleeve drives the mounting frame to move in the first direction when the rotating sleeve rotates; the roller is mounted on the mounting frame; the driving assembly is arranged on the shell and connected with the rotating sleeve so as to drive the rotating sleeve to rotate. When the driving assembly in the roller device drives the rotating sleeve to rotate in the first direction, the rotating sleeve drives the mounting frame to move in the first direction, so that the roller moves up and down relative to the shell, the machine body of the sweeper ascends and descends relative to the ground, and the problem that the adaptability of the sweeper to cleaning faces and obstacles with different heights is poor is solved.

Description

Technical Field

[0001] This application relates to the field of floor cleaning technology, and in particular to a roller device and a sweeper. Background Technology

[0002] Currently, most robotic vacuum cleaners on the market have limited adaptability to cleaning surfaces and obstacles of different heights, such as carpets and door thresholds, and cannot maintain a close fit, thus affecting the cleaning effect. Utility Model Content

[0003] In view of this, embodiments of this application provide a roller device and a sweeping machine to solve the problem that sweeping machines have a weak adaptability to cleaning surfaces and obstacles of different heights.

[0004] The first aspect of this application discloses a roller device, comprising:

[0005] case;

[0006] A rotating sleeve is mounted on the housing and rotates about a first direction.

[0007] The mounting bracket is guided and installed on the housing along the first direction. The mounting bracket is connected to the rotating sleeve. When the rotating sleeve rotates, the rotating sleeve drives the mounting bracket to move along the first direction.

[0008] Rollers are mounted on the mounting bracket;

[0009] A drive assembly is disposed on the housing and connected to the rotating sleeve to drive the rotating sleeve to rotate.

[0010] The beneficial effects of the roller device provided in this application embodiment are as follows: the rotating sleeve is rotatably mounted on the housing around a first direction, that is, the rotating sleeve can only rotate around the first direction but cannot move along the first direction; the mounting bracket is guided and mounted on the housing along the first direction, that is, the mounting bracket can only move along the first direction and cannot rotate around the first direction. Therefore, when the drive assembly drives the rotating sleeve to rotate around the first direction, the rotating sleeve drives the mounting bracket to move along the first direction, so that the roller moves up and down relative to the housing, thereby raising and lowering the body of the sweeper relative to the ground. This solves the problem that the sweeper has a weak adaptability to cleaning surfaces and obstacles of different heights, and keeps the body of the sweeper in contact with the ground at all times to adapt to cleaning scenarios of different heights and improve cleaning ability.

[0011] In some embodiments, the mounting bracket includes a first frame and a second frame, both of which are guided and mounted on the housing along the first direction. The rotating sleeve is connected to the first frame, and when the rotating sleeve rotates, the rotating sleeve drives the first frame to move along the first direction; the first frame drives the second frame to move along the first direction, and the roller is mounted on the second frame.

[0012] In some embodiments, the rotating sleeve is threadedly connected to the first frame.

[0013] In some embodiments, the rotating sleeve has an internal thread, and the first frame has an external thread adapted to the internal thread; or...

[0014] The rotating sleeve has an external thread, and the first frame has an internal thread adapted to the external thread; or,

[0015] The rotating sleeve is provided with a spiral guide groove, and the first frame is provided with a sliding member that slides within the spiral guide groove; or...

[0016] The first frame is provided with a spiral guide groove, and the rotating sleeve is provided with a sliding member that slides within the spiral guide groove.

[0017] In some embodiments, the mounting bracket further includes an elastic element disposed between the first frame and the second frame; the second frame is provided with an anti-detachment part, which prevents the second frame from detaching from the first frame in the first direction.

[0018] In some embodiments, when the rotating sleeve drives the first frame to move along the first direction, the first frame drives the second frame to move along the first direction through the elastic element.

[0019] In some embodiments, when the roller is impacted, the second frame compresses the elastic element to achieve cushioning.

[0020] In some embodiments, the elastic element is a spring.

[0021] In some embodiments, the roller device further includes a roller bracket, which is rotatably mounted on the mounting bracket about the first direction, and the roller is mounted on the roller bracket.

[0022] In some embodiments, the rotating sleeve further has an external toothed portion;

[0023] The drive assembly includes a rotary drive member and a first gear, the first gear being located at the output end of the rotary drive member, and the first gear directly or indirectly meshing with the external gear portion; or...

[0024] The driving component includes a rotary driving component and a worm gear, the worm gear being located at the output end of the rotary driving component and meshing with the external toothed portion; or...

[0025] The drive assembly includes a rotary drive component, a worm gear, a worm, and a first gear. The worm is located at the output end of the rotary drive component. The worm gear meshes with the worm. The first gear is coaxially arranged with the worm gear and meshes directly or indirectly with the external gear portion; or...

[0026] The drive assembly includes a linear drive and a rack, the rack being located at the output end of the linear drive and meshing with the external teeth.

[0027] In some embodiments, the roller device further includes a first sensor disposed on the housing, the drive assembly includes a first gear and a rotary drive member for driving the first gear to rotate, and the first sensor is arranged corresponding to the first gear and is used to monitor the rotation of the first gear.

[0028] In some embodiments, the first sensor is arranged corresponding to the first gear and monitors the rotation of the first gear, including: the first sensor monitoring any one of the number of rotations of the first gear, the rotation angle of the first gear, or the number of times the first sensor is triggered when the first gear rotates.

[0029] In some embodiments, the first sensor is a first light interruptor, which includes a first transmitting end and a first receiving end. The roller device further includes a first blocking member disposed on the first gear, which is positioned between the first transmitting end and the first receiving end when the first gear rotates.

[0030] In some embodiments, a plurality of the first shielding members are arranged at circumferential intervals along the first gear.

[0031] In some embodiments, the roller assembly further includes a second sensor disposed on the housing, the second sensor being arranged corresponding to the mounting bracket and used to monitor the position of the mounting bracket relative to the housing in the first direction, the position including an initial position in the first direction.

[0032] In some embodiments, the second sensor is a second light interruptor, which includes a second transmitting end and a second receiving end. The roller device further includes a second blocking member disposed on the mounting frame, which is positioned between the second transmitting end and the second receiving end when the mounting frame moves along the first direction.

[0033] In some embodiments, a bearing is provided between the first end of the rotating sleeve and the housing, and a self-lubricating sleeve is provided between the second end of the rotating sleeve and the housing; or...

[0034] Bearings are provided between the first and second ends of the rotating sleeve and the housing; or...

[0035] Self-lubricating sleeves are provided between the first and second ends of the rotating sleeve and the housing.

[0036] The second aspect of this application provides a sweeping machine, which includes a body, a drive wheel, and a roller assembly as described in the first aspect. In the direction of movement of the sweeping machine, the roller assembly is located at the front of the body, and the drive wheel is located at the rear of the roller assembly.

[0037] The sweeper employs any one or more embodiments of the roller device described above, and thus has the beneficial effects of the embodiments described above, which will not be elaborated further here.

[0038] In some embodiments, the roller assembly and the drive wheel move up and down synchronously.

[0039] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of the roller device provided in some embodiments of this application;

[0042] Figure 2 yes Figure 1 Front view of the roller assembly (rollers retracted);

[0043] Figure 3 yes Figure 2 A cross-sectional view of the roller assembly shown;

[0044] Figure 4 yes Figure 2 The diagram shown is a schematic of the roller device after the housing has been removed.

[0045] Figure 5yes Figure 4 Exploded view of the mounting bracket and rotating sleeve;

[0046] Figure 6 yes Figure 4 Enlarged view of point A in the middle;

[0047] Figure 7 yes Figure 4 Enlarged view of point B in the middle;

[0048] Figure 8 yes Figure 1 Front view of the roller assembly (rollers extended);

[0049] Figure 9 yes Figure 8 A cross-sectional view of the roller assembly shown;

[0050] Figure 10 This is a cross-sectional view of a roller device provided in some other embodiments of this application;

[0051] Figure 11 These are schematic diagrams of the structure of a sweeping machine provided in some embodiments of this application;

[0052] Figure 12 These are schematic diagrams of the structure of a sweeping machine provided in other embodiments of this application;

[0053] Figure 13 This is a structural schematic diagram of a sweeping machine provided in some embodiments of this application.

[0054] The markings in the diagram mean:

[0055] 100. Sweeping machine;

[0056] 10. Roller assembly;

[0057] 11. Housing; 111. Guide groove; 112. Guide post;

[0058] 12. Rotating sleeve; 121. Internal thread; 122. External toothed part;

[0059] 13. Mounting bracket; 131. First frame body; 1311. External thread; 1312. Second shield; 1313. Guide hole; 132. Second frame body; 1321. Anti-detachment part; 1322. Fastener; 1323. Guide protrusion; 1324. Limiting ring groove; 133. Elastic element;

[0060] 14. Roller; 141. Roller bracket;

[0061] 15. Drive assembly; 151. Worm gear; 152. Worm wheel; 153. First gear; 1531. First blocking component; 154. Intermediate gear; 155. Rotary drive component;

[0062] 16. First sensor; 161. First transmitter; 162. First receiver;

[0063] 17. Second sensor; 171. Second transmitter; 172. Second receiver;

[0064] 18. Bearings;

[0065] 19. Self-lubricating sleeve;

[0066] 20. Fuselage;

[0067] 30. Drive wheel. Detailed Implementation

[0068] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0070] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0071] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0072] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0073] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0074] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0075] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0076] An embodiment of the first aspect of this application provides a roller device. Please refer to... Figures 1 to 3 The roller assembly 10 includes a housing 11, a rotating sleeve 12, a mounting bracket 13, a roller 14, and a drive assembly 15. The rotating sleeve 12 is rotatably mounted on the housing 11 about a first direction X; the mounting bracket 13 is guided and mounted on the housing 11 along the first direction X, and is connected to the rotating sleeve 12. When the rotating sleeve 12 rotates, the rotating sleeve 12 drives the mounting bracket 13 to move along the first direction X; the roller 14 is rotatably mounted on the mounting bracket 13 about a second direction Y, and the second direction Y is perpendicular to the first direction X; the drive assembly 15 is connected to the rotating sleeve 12 and is used to drive the rotating sleeve 12 to rotate.

[0077] The housing 11 serves as the mounting base for mounting components such as the rotating sleeve 12, the mounting bracket 13, and the drive assembly 15. For example... Figure 11 As shown, the roller device 10 is mounted on the body 20 of the sweeper 100 via the housing 11.

[0078] The rotating sleeve 12 is mounted on the housing 11 in a first direction X. This can be understood as the rotating sleeve 12 being able to rotate only on the housing 11 in the first direction X, but not moving along the first direction X.

[0079] Mounting bracket 13 is guided and mounted on housing 11 along the first direction X. This can be understood as mounting bracket 13 being able to move only along the first direction X, but not rotate around the first direction X.

[0080] In this embodiment, the connection relationship between the rotating sleeve 12 and the mounting bracket 13 is not limited, as long as the rotating sleeve 12 can drive the mounting bracket 13 to move along the first direction X when the rotating sleeve 12 rotates.

[0081] It is understandable that the roller 14 can be directly mounted on the mounting bracket 13 or indirectly mounted on the mounting bracket 13.

[0082] The roller 14 rotates around a second direction Y. Optionally, the second direction Y can be perpendicular to or nearly perpendicular to the first direction X. During the use of the roller device 10, the first direction X is vertical or nearly vertical, and the second direction Y is horizontal or nearly horizontal. Of course, the second direction Y can also not be perpendicular to the first direction X; for example, the angle between the second direction Y and the first direction X can be 85°, 80°, 70°, etc.

[0083] In this embodiment, the drive component 15 is not limited, as long as it can drive the rotating sleeve 12 to rotate. For example, the drive component 15 can be a gear mechanism, a gear and rack mechanism, a worm gear mechanism, or a crank and connecting rod mechanism, etc.

[0084] The beneficial effects of the roller device 10 provided in this application embodiment are as follows: The rotating sleeve 12 is rotatably mounted on the housing 11 around the first direction X, that is, the rotating sleeve 12 can only rotate around the first direction X but cannot move along the first direction X; the mounting bracket 13 is guided and mounted on the housing 11 along the first direction X, that is, the mounting bracket 13 can only move along the first direction X but cannot rotate around the first direction X. Therefore, when the drive assembly 15 drives the rotating sleeve 12 to rotate around the first direction X, the rotating sleeve 12 drives the mounting bracket 13 to move along the first direction X, so that the roller 14 moves up and down relative to the housing 11, thereby raising and lowering the body 20 of the sweeper 100 relative to the ground, solving the problem that the sweeper 100 has weak adaptability to carpets and thresholds of different heights, and keeping the body 20 of the sweeper 100 always in contact with the ground to adapt to more cleaning scenarios of different heights and improve cleaning ability.

[0085] When the sweeper 100 crosses an obstacle, such as a threshold, the roller 14 can move downward relative to the housing 11, thereby raising the body 20 of the sweeper 100 to facilitate the sweeper 100 crossing thresholds of different heights.

[0086] Please refer to Figures 3 to 5In some embodiments, the mounting frame 13 includes a first frame 131 and a second frame 132, both of which are guided and mounted on the housing 11 along a first direction X; a rotating sleeve 12 is connected to the first frame 131, and when the rotating sleeve 12 rotates, the rotating sleeve 12 drives the first frame 131 to move along the first direction; the first frame 131 drives the second frame 132 to move along the first direction X, and a roller 14 is mounted on the second frame 132.

[0087] The first frame 131 is guided and mounted on the housing 11 along the first direction X. Optionally, as follows: Figure 3 , Figure 4 and Figure 7 As shown, the housing 11 includes a guide post 112 extending along the first direction X, and the first frame 131 has a guide hole 1313. The guide post 112 and the guide hole 1313 are guided and engaged to achieve the first frame 131 being guided and installed on the housing 11 along the first direction X.

[0088] It is understood that one guide post 112 can be provided, and correspondingly, one guide hole 1313 can be provided; or, multiple guide posts 112 can be provided at intervals along the circumference of the housing 11, and correspondingly, multiple guide holes 1313 can be provided at intervals along the circumference of the first frame 131. For example, two, three, four or more guide posts 112 and guide holes 1313 can be provided.

[0089] The guide post 112 and the guide hole 1313 have the same shape. For example, the guide post 112 and the guide hole 1313 can both be circular, elliptical, fan-shaped, polygonal, etc.

[0090] The second frame 132 is guided and mounted on the housing 11 along the first direction X. Optionally, as follows: Figure 2 and Figure 4 As shown, the housing 11 includes a guide groove 111 extending along the first direction X, and the second frame 132 is provided with a guide protrusion 1323. The guide groove 111 and the guide protrusion 1323 are guided and engaged to realize the second frame 132 being guided and installed on the housing 11 along the first direction X.

[0091] It is understood that one guide groove 111 can be provided, and correspondingly, one guide protrusion 1323 can be provided; or, multiple guide grooves 111 can be provided at intervals along the circumference of the housing 11, and correspondingly, multiple guide protrusions 1323 can be provided at intervals along the circumference of the second frame 132. For example, two, three, four or more guide grooves 111 and guide protrusions 1323 can be provided.

[0092] The guide groove 111 and the guide protrusion 1323 have the same shape. For example, the guide groove 111 and the guide protrusion 1323 can both be circular, elliptical, fan-shaped, polygonal, etc.

[0093] In this embodiment, the connection relationship between the rotating sleeve 12 and the first frame 131 is not limited, as long as the rotating sleeve 12 can drive the first frame 131 to move along the first direction X when the rotating sleeve 12 rotates.

[0094] The first frame 131 drives the second frame 132 to move along the first direction X. This can be understood as the first frame 131 directly driving the second frame 132 to move along the first direction X. For example, the first frame 131 and the second frame 132 are fixedly connected by welding, bonding, fastener connection, snap-fit, interference fit, etc.; or, the first frame 131 can indirectly drive the second frame 132 to move along the first direction X, that is, a transmission component is provided between the first frame 131 and the second frame 132.

[0095] It is understandable that the roller 14 can be directly installed on the second frame 132 or indirectly installed on the second frame 132.

[0096] When the roller 14 is fully retracted, the first frame 131 is located inside the upper end of the rotating sleeve 12, as shown below. Figure 2 and Figure 3 As shown. When it is necessary to extend the roller 14, the rotating sleeve 12 rotates to drive the first frame 131 to move downwards, and the first frame 131 drives the second frame 132 to move downwards, thereby realizing the downward movement of the roller 14. When the roller 14 is fully extended, as shown... Figure 8 and Figure 9 As shown, the first frame 131 is located inside the lower end of the rotating sleeve 12. During the above process, the anti-detachment part 1321 is always in contact with the first frame 131. The vertical movement range of the roller 14 can be 0-20mm.

[0097] Based on the above technical solution, dividing the mounting frame 13 into a first frame 131 and a second frame 132 is beneficial for the processing of the mounting frame 13.

[0098] Alternatively, the first frame 131 and the second frame 132 can be integrally formed.

[0099] Please refer to Figure 3 In some embodiments, the rotating sleeve 12 is threadedly connected to the first frame 131.

[0100] It can be understood that the rotating sleeve 12 has an internal thread 121, and the first frame 131 has an external thread 1311 that matches the internal thread 121; or, the rotating sleeve 12 has an external thread 1311, and the first frame 131 has an internal thread 121 that matches the external thread 1311. That is, the first frame 131 is threadedly connected to the rotating sleeve 12 by the engagement of the external thread 1311 and the internal thread 121, that is, when the rotating sleeve 12 rotates around the first direction X, the rotating sleeve 12 can drive the first frame 131 to move along the first direction X.

[0101] Based on the above scheme, by connecting the rotating sleeve 12 to the first frame 131 by thread, the roller 14 can be infinitely adjusted, and the stability is good during the adjustment process.

[0102] In other embodiments, a spiral guide groove can be provided on the rotating sleeve 12, and the first frame 131 has a sliding member that cooperates with the spiral guide groove; or, a spiral guide groove can be provided on the first frame 131, and the rotating sleeve 12 has a sliding member that cooperates with the spiral guide groove. That is, the first frame 131 is threadedly connected to the rotating sleeve 12 through the cooperation of the spiral guide groove and the sliding member. When the rotating sleeve 12 rotates around the first direction X, the rotating sleeve 12 can drive the first frame 131 to move along the first direction X. The sliding member can be a sliding block, a sliding column, etc.

[0103] Please refer to Figure 3 and Figure 5 In some embodiments, the mounting bracket 13 further includes an elastic element 133, which is disposed between the first bracket 131 and the second bracket 132; the second bracket 132 is provided with an anti-detachment part 1321, which prevents the second bracket 132 from detaching from the first bracket 131 in the first direction X.

[0104] An elastic element 133 is disposed between the first frame 131 and the second frame 132. The first end of the elastic element 133 abuts against the first frame 131, and the second end of the elastic element 133 abuts against the second frame 132. Optionally, the second frame 132 has a limiting annular groove 1324, and the second end of the elastic element 133 is located within the limiting annular groove 1324 to ensure the stability of the elastic element 133 during deformation.

[0105] Optionally, the elastic element 133 is a spring. Of course, the elastic element 133 can also be elastic rubber.

[0106] Under the elastic force of the elastic member 133, the second frame 132 and the first frame 131 tend to move away from each other, and the anti-detachment part 1321 can prevent the second frame 132 from detaching from the first frame 131 in the first direction X. It can be understood that the second frame 132 is suspended on the first frame 131.

[0107] Optionally, the anti-detachment part 1321 is an anti-detachment plate, which is fixed to the second frame 132 by fasteners 1322, such as screws, bolts, rivets, etc. Of course, the anti-detachment part 1321 can also be an anti-detachment hook integrally formed on the second frame 132.

[0108] When the rotating sleeve 12 drives the first frame 131 to move along the first direction X, the first frame 131 drives the second frame 132 to move along the first direction X through the elastic element 133.

[0109] like Figure 10 As shown, during the obstacle-crossing process of the sweeper 100, such as when crossing a threshold, the threshold acts as a barrier to the roller 14, causing an impact. Similarly, after the sweeper 100 crosses the threshold, the roller 14 hits the ground, also causing an impact. During the impact, the second frame 132 can compress the elastic element 133 to achieve a buffering effect. Simultaneously, the second frame 132 moves upward relative to the first frame 131, and the anti-detachment part 1321 separates from the first frame 131. Specifically, when the roller 14 is fully retracted, the compressibility of the elastic element 133 is small, meaning the buffering distance is small, for example, it can buffer about 1mm; when the roller 14 is fully extended, the compressibility of the elastic element 133 is large, meaning the buffering distance is large, for example, it can buffer about 4mm.

[0110] Based on the above technical solution, by setting an elastic element 133 between the first frame 131 and the second frame 132, the impact on the roller 14 during the movement is absorbed, which plays a buffering role and protects the whole machine.

[0111] Please refer to Figure 3 In some embodiments, the roller device 10 further includes a roller bracket 141, which is rotatably mounted on the mounting frame 13 about a first direction X, and the roller 14 is rotatably mounted on the roller bracket 141 about a second direction Y.

[0112] When the mounting frame 13 includes a first frame 131 and a second frame 132, the roller bracket 141 is rotatably mounted on the second frame 132 about a first direction X.

[0113] The roller 14 is mounted on the roller bracket 141 and rotates around the second direction Y. That is, the roller 14 is indirectly mounted on the mounting bracket 13. Optionally, the roller 14 is indirectly mounted on the second frame 132.

[0114] Based on the above technical solution, since the roller 14 is mounted on the roller bracket 141 around the second direction Y, and the roller bracket 141 is mounted on the mounting frame 13 around the first direction X, the roller 14 is a universal wheel, which can realize the movement of the product in all directions.

[0115] Alternatively, the roller bracket 141 can be omitted, and the roller 14 can be mounted on the mounting frame 13, rotating around the second direction Y. Optionally, the roller 14 can be mounted on the second frame 132, rotating around the second direction Y. Alternatively, the roller bracket 141 can be provided, and the roller 14 can be mounted on the roller bracket 141, rotating around the second direction Y, but the roller bracket 141 is fixed to the mounting frame 13. Optionally, the roller bracket 141 is fixed to the second frame 132. In this case, the roller 14 is a regular roller, i.e., a non-omnidirectional wheel.

[0116] Please refer to Figure 3 and Figure 4 In some embodiments, the rotating sleeve 12 also has an external toothed portion 122. The drive assembly 15 includes a rotary drive 155, a worm gear 152, a worm 151, and a first gear 153. The worm 151 is located at the output end of the rotary drive 155. The worm gear 152 meshes with the worm 151. The first gear 153 is coaxially arranged with the worm gear 152 and rotates synchronously. The first gear 153 meshes directly or indirectly with the external toothed portion 122.

[0117] Optionally, the external teeth 122 are located on the outer peripheral surface of the rotating sleeve 12 and are arranged in a circle around the rotating sleeve 12.

[0118] Among them, the rotary drive 155 refers to the drive component that performs rotational motion at the output end. For example, the rotary drive 155 can be a rotary motor.

[0119] The rotation axis of the worm 151 is perpendicular to the first direction X. This can be understood as the rotation axis of the worm 151 being parallel to the rotation axis of the roller 14, or intersecting the rotation axis of the roller 14 in a different plane.

[0120] The first gear 153 and the worm gear 152 are arranged coaxially, which can be understood as the rotation axis of the first gear 153 coinciding with the rotation axis of the worm gear 152. The rotation axes of the first gear 153 and the worm gear 152 extend along a first direction X.

[0121] The first gear 153 rotates synchronously with the worm gear 152. This can be understood as the first gear 153 and the worm gear 152 being integrally formed; or, the first gear 153 and the worm gear 152 being fixedly connected by welding, fastener connection, snap-fit, interference fit, or other methods; or, the first gear 153 and the worm gear 152 being separately arranged and installed on the same rotating shaft.

[0122] It is understood that the first gear 153 and the external gear 122 can directly mesh, that is, there are no other gears between the first gear 153 and the external gear 122. Alternatively, the first gear 153 and the external gear 122 can also indirectly mesh, that is, there is at least one other gear between the first gear 153 and the external gear 122; for example, there is an intermediate gear 154 between the first gear 153 and the external gear 122, wherein the rotation axis of the intermediate gear 154 extends along the first direction X, and the intermediate gear 154 meshes with both the first gear 153 and the external gear 122.

[0123] During operation, the output end of the rotary drive 155 drives the worm gear 151 to rotate, the worm gear 151 drives the worm wheel 152 and the first gear 153 to rotate synchronously, the first gear 153 directly or indirectly drives the rotating sleeve 12 to rotate, and the rotation of the rotating sleeve 12 drives the mounting bracket 13 to move up and down, thereby realizing the up and down movement of the roller 14 relative to the housing 11.

[0124] Based on the above scheme, the meshing transmission of worm gear 152 and worm 151 has a large reduction ratio, which is beneficial for the drive assembly 15 to drive the rotating sleeve 12 to rotate; moreover, worm gear 152 and worm 151 can achieve self-locking, so that the roller 14 can be in any position within the lifting stroke, and the roller device 10 does not need to be equipped with an additional self-locking structure.

[0125] Alternatively, the worm gear 152 and worm 151 can be omitted, and the rotary drive 155 can directly drive the first gear 153 to rotate, with the first gear 153 directly or indirectly meshing with the external tooth portion 122. Alternatively, the first gear 153, intermediate gear 154, and worm gear 152 can be omitted, and the rotary drive 155 can drive the worm 151 to rotate, with the worm 151 directly meshing with the external tooth portion 122 of the rotating sleeve 12.

[0126] Please refer to Figure 4 In some embodiments, based on the presence of a first gear 153, the roller device 10 further includes a first sensor 16 disposed on the housing 11. The first sensor 16 is arranged correspondingly to the first gear 153 and is used to monitor the rotation of the first gear 153.

[0127] It can be understood that the first sensor 16 can monitor the number of rotations of the first gear 153, that is, determine the amount of rotation of the first gear 153 by measuring how many rotations the first gear 153 has made; or, the first sensor 16 can monitor the rotation angle of the first gear 153, that is, determine the amount of rotation of the first gear 153 by measuring how many rotation angles the first gear 153 has made; or, the first sensor 16 can monitor the number of times it is triggered when the first gear 153 is rotating, that is, determine the amount of rotation of the first gear 153 by measuring the number of times it is triggered when the first gear 153 is rotating.

[0128] A light interruptor is a photoelectric sensor that detects objects, determines their position, or controls their motion by detecting whether light is blocked or passing through it. It typically consists of a light-emitting element (at the emitting end) and a light-receiving element (at the receiving end), forming an optical path between them. When an object enters the optical path and blocks the light, the light-receiving element will output a change in signal, which is considered to trigger the light interruptor once.

[0129] Please refer to Figure 4 and Figure 6 In some embodiments, the first sensor 16 is a first light interruptor, which includes a first transmitting end 161 and a first receiving end 162. The roller device 10 also includes a first blocking member 1531 disposed on the first gear 153. The first blocking member 1531 can be positioned between the first transmitting end 161 and the first receiving end 162 when the first gear 153 rotates.

[0130] It is understandable that the first shielding component 1531 can be a thinner first shielding sheet or a thicker first shielding block.

[0131] When the first blocking member 1531 rotates between the first transmitting end 161 and the first receiving end 162, the output signal of the first receiving end 162 changes to determine the amount of rotation of the first gear 153, and then determines the amount of vertical movement of the roller 14 according to the transmission ratio.

[0132] It can be understood that the number of first blocking elements 1531 can be one, and the rotation angle of the first gear 153 is 360° when the output signal of the first receiver 162 changes. Alternatively, the number of first blocking elements 1531 can be multiple. For example, when there are two first blocking elements 1531, the rotation angle of the first gear 153 is 180° when the output signal of the first receiver 162 changes; when there are three first blocking elements 1531, the rotation angle of the first gear 153 is 120°; when there are four first blocking elements 1531, the rotation angle of the first gear 153 is 90°; and so on. The more first blocking elements 1531 there are, the faster the frequency of the output signal change of the first receiver 162, and the higher the control accuracy.

[0133] Alternatively, the first blocking element 1531 can be omitted, and the first sensor 16 can be a distance sensor with a relatively small measurement distance, such as a capacitive sensor or an inductive sensor. When the first sensor 16 is above the teeth of the first gear 153, the first sensor 16 detects the teeth of the first gear 153 and outputs a signal change; when the first sensor 16 is above the gap between two adjacent teeth of the first gear 153, the first sensor 16 cannot detect the teeth of the first gear 153 and does not output a signal change.

[0134] Please refer to Figure 4 In some embodiments, the roller device 10 further includes a second sensor 17 disposed on the housing 11. The second sensor 17 is arranged correspondingly to the mounting bracket 13 and is used to monitor the position of the mounting bracket 13 relative to the housing in a first direction, including an initial position in the first direction.

[0135] When the mounting frame 13 includes a first frame 131 and a second frame 132, the second sensor 17 is arranged correspondingly to the first frame 131 and is used to monitor whether the first frame 131 is in its initial position. The initial position of the first frame 131 means that the first frame 131 is located inside the upper end of the rotating sleeve 12.

[0136] Based on the above technical solution, when the second sensor 17 detects that the mounting bracket 13 has returned to its initial position, the controller controls the drive assembly 15 to stop working, that is, the mounting bracket 13 will no longer continue to move upward, so as to avoid the mounting bracket 13 pressing against the housing 11 and causing damage to the housing 11.

[0137] Please refer to Figure 4 , Figure 5 and Figure 7 In some embodiments, the second sensor 17 is a second light interruptor, which includes a second transmitting end 171 and a second receiving end 172. The roller device 10 also includes a second blocking member 1312 disposed on the mounting frame 13. The second blocking member 1312 can be positioned between the second transmitting end 171 and the second receiving end 172 when the mounting frame 13 moves along the first direction X.

[0138] Optionally, the second shielding member 1312 is mounted on the first frame 131. The second shielding member 1312 can be a thinner second shielding sheet or a thicker second shielding block.

[0139] When the second shield 1312 moves upward to between the second transmitter 171 and the second receiver 172, the output signal of the second receiver 172 changes to determine that the mounting bracket 13 has returned to its initial position, thereby controlling the drive assembly 15 to stop working.

[0140] Alternatively, the second obstruction 1312 can be omitted, and the second sensor 17 can be a distance sensor with a small measurement distance, such as a capacitive sensor or an inductive sensor. When the mounting bracket 13 returns to its initial position, the second sensor 17 detects the mounting bracket 13 and outputs a signal change; when the mounting bracket 13 moves downward away from its initial position, the second sensor 17 cannot detect the mounting bracket 13 and does not output a signal change.

[0141] Please refer to Figure 3In some embodiments, a bearing 18 is provided between the first end of the rotating sleeve 12 and the housing 11, and a self-lubricating sleeve 19 is provided between the second end of the rotating sleeve 12 and the housing 11.

[0142] It can be understood that the first end can be either the upper end or the lower end of the rotating sleeve 12. When the first end is the upper end of the rotating sleeve 12, the second end is the lower end of the rotating sleeve 12; when the first end is the lower end of the rotating sleeve 12, the second end is the upper end of the rotating sleeve 12.

[0143] The self-lubricating sleeve 19 is a part that can achieve low-friction movement without external lubrication. The self-lubricating sleeve 19 can be a metal sleeve, such as a copper sleeve; or it can be a plastic sleeve, such as a polytetrafluoroethylene sleeve.

[0144] Based on the above technical solution, the friction force when the rotating sleeve 12 rotates can be reduced, which is beneficial for the rotating sleeve 12 to rotate on the housing 11, thereby reducing energy loss.

[0145] Alternatively, bearings 18 can be provided between the first and second ends of the rotating sleeve 12 and the housing 11; or, self-lubricating sleeves 19 can be provided between the first and second ends of the rotating sleeve 12 and the housing 11.

[0146] In some embodiments, the rotating sleeve 12 further has an external toothed portion 122, and the drive assembly 15 includes a linear drive member and a rack that meshes with the external toothed portion 122, the rack being disposed at the output end of the linear drive member.

[0147] Linear drive components refer to drive components that produce linear motion at their output end. Examples of linear drive components include linear motors, telescopic cylinders (such as hydraulic cylinders and pneumatic cylinders), and electric push rods.

[0148] During operation, the output end of the linear drive unit drives the rack to move in a straight line. Since the rack meshes with the outer tooth 122 of the rotating sleeve 12, the rack can drive the rotating sleeve 12 to rotate. The rotation of the rotating sleeve 12 drives the mounting bracket 13 to move up and down, thereby realizing the up and down movement of the roller 14 relative to the housing 11.

[0149] Alternatively, the roller device 10 may also include a chain, with chain teeth on the outer circumferential surface of the rotating sleeve 12. The drive assembly 15 includes a rotary drive 155, a sprocket, and a chain. The sprocket is located at the output end of the rotary drive 155, and the chain is wound around the sprocket and chain teeth. When the output end of the rotary drive 155 drives the sprocket to rotate, the sprocket drives the rotating sleeve 12 to rotate through the chain. The rotation of the rotating sleeve 12 drives the mounting bracket 13 to move up and down, thereby realizing the up and down movement of the roller 14 relative to the housing 11.

[0150] Please refer to Figure 11The second aspect of this application discloses a sweeping machine 100, which includes a body 20, drive wheels 30, and a roller device 10 as described in the first aspect. The roller device 10 is located at the front of the body 20 and the drive wheels 30 are located at the rear of the body 20 in the direction of movement of the sweeping machine 100.

[0151] In some embodiments, such as Figure 12 As shown, the roller 14 and drive wheel 30 can extend and retract synchronously to keep the body 20 in a horizontal position, at which time the sweeper 100 is in normal cleaning state.

[0152] In some embodiments, such as Figure 13 As shown, when the drive wheel 30 is not extended or retracted and the roller 14 extends out of the housing 11, the roller device 10 can lift the front of the body 20. At this time, the sweeper 100 can overcome obstacles, such as carpets, thresholds, etc.

[0153] The sweeper 100 adopts any one or more embodiments of the roller device 10 described above, and thus has the beneficial effects of the above embodiments, which will not be described in detail here.

[0154] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A roller device, characterized in that, include: case; A rotating sleeve is mounted on the housing and rotates about a first direction. The mounting bracket is guided and installed on the housing along the first direction. The mounting bracket is connected to the rotating sleeve. When the rotating sleeve rotates, the rotating sleeve drives the mounting bracket to move along the first direction. Rollers are mounted on the mounting bracket; A drive assembly is disposed on the housing and connected to the rotating sleeve to drive the rotating sleeve to rotate.

2. The roller device as described in claim 1, characterized in that, The mounting frame includes a first frame and a second frame. Both the first frame and the second frame are guided and mounted on the housing along the first direction. The rotating sleeve is connected to the first frame. When the rotating sleeve rotates, the rotating sleeve drives the first frame to move along the first direction. The first frame drives the second frame to move along the first direction. The roller is mounted on the second frame.

3. The roller device as described in claim 2, characterized in that, The rotating sleeve is threadedly connected to the first frame.

4. The roller device as described in claim 3, characterized in that, The rotating sleeve has an internal thread, and the first frame has an external thread that matches the internal thread; or... The rotating sleeve has an external thread, and the first frame has an internal thread adapted to the external thread; or, The rotating sleeve is provided with a spiral guide groove, and the first frame is provided with a sliding member that slides within the spiral guide groove; or... The first frame is provided with a spiral guide groove, and the rotating sleeve is provided with a sliding member that slides within the spiral guide groove.

5. The roller device as described in claim 2, characterized in that, The mounting bracket also includes an elastic element disposed between the first frame and the second frame; the second frame is provided with an anti-detachment part, which prevents the second frame from detaching from the first frame in the first direction.

6. The roller device as described in claim 5, characterized in that, When the rotating sleeve drives the first frame to move along the first direction, the first frame drives the second frame to move along the first direction through the elastic element.

7. The roller device as described in claim 5, characterized in that, When the roller is impacted, the second frame compresses the elastic element to achieve cushioning.

8. The roller device as described in claim 5, characterized in that, The elastic element is a spring.

9. The roller device as described in any one of claims 1-8, characterized in that, The roller device further includes a roller bracket, which is rotatably mounted on the mounting frame about the first direction, and the roller is mounted on the roller bracket.

10. The roller device as claimed in any one of claims 1-8, characterized in that, The rotating sleeve also has an external toothed portion; The drive assembly includes a rotary drive member and a first gear, the first gear being located at the output end of the rotary drive member, and the first gear directly or indirectly meshing with the external gear portion; or... The driving component includes a rotary driving component and a worm gear, the worm gear being located at the output end of the rotary driving component and meshing with the external toothed portion; or... The drive assembly includes a rotary drive component, a worm gear, a worm, and a first gear. The worm is located at the output end of the rotary drive component. The worm gear meshes with the worm. The first gear is coaxially arranged with the worm gear and meshes directly or indirectly with the external gear portion; or... The drive assembly includes a linear drive and a rack, the rack being located at the output end of the linear drive and meshing with the external teeth.

11. The roller device as claimed in any one of claims 1-8, characterized in that, The roller device further includes a first sensor disposed on the housing, and the drive assembly includes a first gear and a rotary drive member for driving the first gear to rotate. The first sensor is arranged corresponding to the first gear and monitors the rotation of the first gear.

12. The roller device as claimed in claim 11, characterized in that, The first sensor is arranged corresponding to the first gear and monitors the rotation of the first gear, including: the first sensor monitoring any one of the following: the number of rotations of the first gear, the rotation angle of the first gear, or the number of times the first sensor is triggered when the first gear rotates.

13. The roller device as claimed in claim 12, characterized in that, The first sensor is a first light interruptor, which includes a first transmitting end and a first receiving end. The roller device also includes a first blocking member disposed on the first gear, which can be positioned between the first transmitting end and the first receiving end when the first gear rotates.

14. The roller device as claimed in claim 13, characterized in that, The first shielding member is arranged in multiple circumferentially along the first gear.

15. The roller device as claimed in any one of claims 1-8, characterized in that, The roller device further includes a second sensor disposed on the housing, the second sensor being arranged correspondingly to the mounting bracket and used to monitor the position of the mounting bracket relative to the housing in the first direction, the position including an initial position in the first direction.

16. The roller device as claimed in claim 15, characterized in that, The second sensor is a second light interruptor, which includes a second transmitting end and a second receiving end. The roller device also includes a second blocking member disposed on the mounting frame. The second blocking member can be positioned between the second transmitting end and the second receiving end when the mounting frame moves along the first direction.

17. The roller device as claimed in any one of claims 1-8, characterized in that, A bearing is provided between the first end of the rotating sleeve and the housing, and a self-lubricating sleeve is provided between the second end of the rotating sleeve and the housing; or... Bearings are provided between the first and second ends of the rotating sleeve and the housing; or... Self-lubricating sleeves are provided between the first and second ends of the rotating sleeve and the housing.

18. A sweeping machine, characterized in that, The sweeper includes a body, a drive wheel, and a roller device as described in any one of claims 1-17. In the direction of movement of the sweeper, the roller device is located at the front of the body, and the drive wheel is located at the rear of the roller device.

19. The sweeper as described in claim 18, characterized in that, The roller device and the drive wheel move up and down synchronously.

Images