Shaft-hub connecting structure, cleaning base station, cleaning robot and cleaning system

Abstract

The utility model provides a shaft-hub connecting structure, a cleaning base station, a cleaning robot and a cleaning system.The shaft-hub connecting structure comprises a shaft part, a connecting part and a connecting part, a shaft connecting hole is formed in the hub part, and the shaft part penetrates through the shaft connecting hole; the limiting part has a limiting state and an unlocking state; in the limiting state, the limiting part enables the shaft part and the hub part to be in limiting connection, so that the shaft part and the hub part can rotate synchronously; and under the condition that the torque transmitted between the shaft part and the hub part is increased to the preset torque, the limiting part is switched from the limiting state to the unlocking state, so that the shaft part and the hub part can rotate relatively.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of cleaning equipment, and particularly relates to a shaft hub connecting structure, a cleaning base station, a cleaning robot and a cleaning system. BACKGROUND

[0002] In the related art, an automatic cleaning device usually has a transmission system, and in the running process, power transmission in the form of rotation is often involved. Accordingly, there are relatively more components with shaft hub connecting relationship in the transmission system. However, if the torque between the shaft hubs is large during the running process, the shaft parts and hub parts therein are extremely easy to be damaged, which is not conducive to the stable and reliable operation of the automatic cleaning device. CONTENT OF THE UTILITY MODEL

[0003] The present disclosure aims to at least solve one of the technical problems existing in the prior art or the related art.

[0004] To this end, a first aspect of the present disclosure provides a shaft hub connecting structure.

[0005] A second aspect of the present disclosure provides a cleaning base station.

[0006] A third aspect of the present disclosure provides a cleaning robot.

[0007] A third aspect of the present disclosure provides a cleaning system.

[0008] Therefore, according to the first aspect of the embodiments of the present disclosure, a shaft hub connecting structure is provided, which comprises:

[0009] a shaft part;

[0010] a hub part, which is provided with a shaft connecting hole, and the shaft part is arranged in the shaft connecting hole;

[0011] a limiting part, which has a limiting state and an unlocking state;

[0012] In the limiting state, the limiting part limits the connection between the shaft part and the hub part, so that the shaft part and the hub part can rotate synchronously. When the torque transmitted between the shaft part and the hub part increases to a preset torque, the limiting part is switched from the limiting state to the unlocking state, so that the shaft part and the hub part can rotate relatively.

[0013] In a possible implementation, one of the shaft part and the hub part is provided with a connecting groove, and the limiting part is arranged in the other of the shaft part and the hub part and is adapted to extend into or exit from the connecting groove. In the limiting state, at least part of the limiting part is located in the connecting groove.

[0014] In an embodiment, the shaft portion is provided with a first connecting groove, the connecting groove includes the first connecting groove, the first connecting groove is located on the circumferential side of the shaft portion, the limiting portion is arranged on the hole wall of the shaft hole and is adapted to extend into or exit the first connecting groove, and in the limiting state, at least part of the limiting portion is located in the first connecting groove.

[0015] The length of the limiting portion along the radial direction of the hub portion is retractable, and the length of the limiting portion extending into the first connecting groove along the radial direction of the shaft portion decreases as the torque transmitted between the shaft portion and the hub portion increases.

[0016] In an embodiment, the hub portion is provided with a second connecting groove, the connecting groove includes the second connecting groove, the second connecting groove is located on the hole wall of the shaft hole, and the limiting portion is arranged on the circumferential side of the shaft portion and is adapted to extend into or exit the second connecting groove, and in the limiting state, at least part of the limiting portion is located in the second connecting groove.

[0017] The length of the limiting portion along the radial direction of the shaft portion is retractable, and the length of the limiting portion extending into the second connecting groove along the radial direction of the shaft portion decreases as the torque transmitted between the shaft portion and the hub portion increases.

[0018] In an embodiment, the limiting portion is elastic and is adapted to elastically deform along the radial direction of the shaft portion or the hub portion.

[0019] In an embodiment, the limiting portion includes:

[0020] An elastic member;

[0021] A plug-in part connected to the elastic member, the plug-in part is formed with a connecting wall;

[0022] In the case where the shaft portion is provided with the first connecting groove, the elastic member is connected between the hub portion and the plug-in part, and the connecting wall is used to abut the groove wall of the first connecting groove; in the case where the hub portion is provided with the second connecting groove, the elastic member is connected between the shaft portion and the plug-in part, and the connecting wall is used to abut the groove wall of the second connecting groove.

[0023] In an embodiment, in the case where the shaft portion is provided with the first connecting groove, the hole wall of the shaft hole is provided with a first mounting hole, the elastic member is movably arranged in the first mounting hole, and in the case where the elastic member is in a relaxed state, at least part of the plug-in part is located outside the first mounting hole;

[0024] In the case where the hub portion is provided with the second connecting groove, the circumferential side of the shaft portion is provided with a second mounting hole, the elastic member is movably arranged in the second mounting hole, and in the case where the elastic member is in a relaxed state, at least part of the plug-in part is located outside the second mounting hole.

[0025] In an embodiment, the first mounting hole extends along the radial direction of the hub portion;

[0026] The second mounting hole extends along a radial direction of the shaft portion.

[0027] In an embodiment, the first connecting groove is formed in the shaft portion, and in a projection plane perpendicular to the axial direction of the hub portion, the profile of the connecting wall comprises a convex curve segment having an opening, the opening facing away from the axial center of the hub portion.

[0028] In an embodiment, the second connecting groove is formed in the hub portion, and in a projection plane perpendicular to the axial direction of the shaft portion, the profile of the connecting wall comprises a convex curve segment having an opening, the opening facing toward the axial center of the shaft portion.

[0029] In an embodiment, the convex curve segment is in the shape of a circular arc or a conic curve.

[0030] In an embodiment, the connecting wall is in the shape of a spherical cap or an ellipsoidal cap.

[0031] In an embodiment, the plug is made of a hard material.

[0032] In an embodiment, the shaft portion is provided with a second mounting hole, and the shaft portion comprises:

[0033] a shaft body provided with a mounting groove and a second mounting hole, the mounting groove being in communication with the second mounting hole;

[0034] a cover body detachably arranged on the shaft body, the cover body being used to open or cover the slot opening of the mounting groove.

[0035] In an embodiment, the number of the limiting portions and the number of the connecting grooves are plural, the plurality of limiting portions are uniformly arranged along the circumference of one of the shaft portion and the hub portion, and the plurality of connecting grooves are uniformly arranged along the circumference of the other of the shaft portion and the hub portion.

[0036] The number of the limiting portions is the same as and one-to-one corresponds to the number of the connecting grooves; or

[0037] The number of the connecting grooves is greater than the number of the limiting portions, and the interval angle between the adjacent two limiting portions is an integer multiple of the interval angle between the adjacent two connecting grooves.

[0038] In an embodiment, the limiting portion is made of a flexible and elastic material.

[0039] In an embodiment, the limiting portion comprises:

[0040] an elastic buckle arranged on the circumferential side of one of the shaft portion and the hub portion, the circumferential side of the other of the shaft portion and the hub portion being formed with a clamping groove, and the elastic buckle being clamped in the clamping groove.

[0041] According to a second aspect of the embodiments of the present disclosure, a cleaning base station is provided, comprising:

[0042] The shaft hub connecting structure as claimed in any one of the preceding claims.

[0043] According to a third aspect of the embodiments of the present disclosure, a cleaning robot is provided, comprising:

[0044] The shaft hub connecting structure as claimed in any one of the preceding claims.

[0045] According to a fourth aspect of the embodiments of the present disclosure, a cleaning system is provided, comprising:

[0046] The cleaning base station as claimed in any one of the preceding claims; and / or

[0047] The cleaning robot as claimed in any one of the preceding claims.

[0048] The above description is merely a summary of the technical solutions of the present disclosure. In order to enable one of ordinary skill in the art to better understand the technical means of the present disclosure, the contents of the specification can be implemented, and in order to make the above and other characteristics and effects of the present disclosure more apparent and easy to understand, the following embodiments of the present disclosure are described. BRIEF DESCRIPTION OF DRAWINGS

[0049] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of exemplary embodiments. The accompanying drawings are merely schematic and are not drawn to scale. Moreover, in the figures, like reference numerals designate like parts throughout the several views. In the drawings:

[0050] Figure 1 A schematic exploded structure diagram of a shaft hub connecting structure according to an embodiment of the present disclosure;

[0051] Figure 2 A schematic partial cross-sectional view of a shaft hub connecting structure according to an embodiment of the present disclosure;

[0052] Figure 3 A schematic connecting structure diagram of a shaft portion and a limiting portion according to an embodiment of the present disclosure;

[0053] Figure 4 A schematic structure diagram of a shaft body according to an embodiment of the present disclosure;

[0054] Figure 5 A schematic partial enlarged view of a hub portion according to an embodiment of the present disclosure;

[0055] Figure 6 A schematic partial structure diagram of a cleaning base station according to an embodiment of the present disclosure;

[0056] Figure 7A schematic structural diagram of a cleaning robot according to an embodiment of the present disclosure;

[0057] Figure 8 A schematic structural diagram of a cleaning system according to an embodiment of the present disclosure.

[0058] wherein, Figures 1 to 5 The correspondence between the reference signs and the component names in the accompanying drawings is as follows:

[0059] 1a cleaning base station; 1b cleaning robot;

[0060] 10 shaft hub connecting structure;

[0061] 100 shaft part; 200 hub part; 300 limiting part;

[0062] 110 shaft body; 120 cover body;

[0063] 310 elastic member; 320 plug-in member;

[0064] 101 second mounting hole; 102 mounting groove;

[0065] 201 shaft hole; 202 second connecting groove;

[0066] 301 connecting wall. DETAILED DESCRIPTION

[0067] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0068] As Figures 1 to 5 shown, according to a first aspect of an embodiment of the present disclosure, a shaft hub connecting structure 10 is provided, comprising: a shaft part 100; a hub part 200, provided with a shaft hole 201, the shaft part 100 being arranged in the shaft hole 201; a limiting part 300, having a limiting state and an unlocking state; in the limiting state, the limiting part 300 limits the connection between the shaft part 100 and the hub part 200, so that the shaft part 100 and the hub part 200 can rotate synchronously; in the case that the torque transmitted between the shaft part 100 and the hub part 200 increases to a preset torque, the limiting part 300 is switched from the limiting state to the unlocking state, so that the shaft part 100 and the hub part 200 can rotate relatively.

[0069] The shaft hub connection structure 10 provided by the embodiments of the present disclosure comprises a shaft part 100, a hub part 200 and a limiting part 300, wherein the shaft part 100 is arranged in the connecting shaft hole 201 of the hub part 200, the shaft part 100 and the hub part 200 can realize synchronous rotation or relative rotation based on the state of the limiting part 300, and correspondingly, the limiting part 300 has the aforementioned limiting state and the aforementioned unlocking state; when the limiting part 300 is in the aforementioned limiting state, the shaft part 100 and the hub part 200 can be connected by limiting through the limiting part 300, so that the relative position between the shaft part 100 and the hub part 200 is fixed, and torque can be transmitted through the limiting part 300, and the two can rotate synchronously; in actual application, the shaft part 100 can be used to connect a power device to receive power, and can transmit power to the hub part 200 through the limiting part 300 to drive the hub part 200 to complete corresponding rotating action; in the case that the torque transmitted between the shaft part 100 and the hub part 200 increases and reaches a preset torque, the state of the limiting part 300 can be switched from the aforementioned limiting state to the aforementioned unlocking state, and correspondingly, the limiting connection relationship between the shaft part 100 and the hub part 200 is released, so that the shaft part 100 and the hub part 200 can rotate relatively; in this case, the torque transmitted between the shaft part 100 and the hub part 200 through the limiting part 300 is greatly reduced, which can avoid that the shaft part 100 and the hub part 200 are subjected to excessive force, and reduce the damage risk of the hub part 200 and other components in the transmission chain.

[0070] It should be noted that the shaft hub connection structure 10 provided by the embodiments of the present disclosure can be applied to cleaning equipment, for example, can be applied to cleaning robots 1b such as sweeping robots, sweeping and mopping robots, etc., and can also be applied to cleaning bases 1a corresponding to the cleaning robots 1b.

[0071] Taking the case that the shaft hub connection structure 10 is applied to the cleaning robot 1b as an example, the aforementioned hub part 200 can be but is not limited to a transmission component such as a gear or a pulley in the transmission system of the cleaning robot, can also be but is not limited to a main mop, an edge mop or other cleaning elements that use rotation to perform cleaning action, and can also be other rotating components; correspondingly, the aforementioned shaft part 100 can serve as a rotating shaft that transmits power to the aforementioned transmission component or cleaning element or other rotating component; in actual application, for example, when the hub part 200 is stuck during rotation due to external structure interference, or there is a phenomenon that a person accidentally touches the hub part 200, or the hub part 200 cannot rotate due to other factors, the torque between the shaft part 100 and the hub part 200 will increase accordingly; in this case, based on the aforementioned arrangement of the shaft hub connection structure 10 provided by the present disclosure, the limiting part 300 can be switched from the aforementioned limiting state to the aforementioned unlocking state, thereby reducing the torque transmitted between the shaft part 100 and the hub part 200, and further avoiding that the shaft part 100 and the hub part 200 are structurally damaged, reducing the maintenance cost of the cleaning base, and being conducive to reducing the harm of the hub part 200 to the accidental toucher.

[0072] For example, the hub connection structure 10 is applied to the cleaning base station 1a, the hub portion 200 can be, but is not limited to, a rotating disc, a scraping cleaning piece, and the like rotating component; accordingly, the shaft portion 100 can serve as a rotating shaft for transmitting power to the rotating component; similarly, the hub connection structure 10 provided by the embodiments of the present disclosure can avoid structural damage between the shaft portion 100 and the hub portion 200, reduce the maintenance cost of the cleaning base station, and facilitate reducing the harm of the hub portion 200 to the accidental touchers.

[0073] It can be understood that the shaft hole 201 and the shaft portion 100 are in a clearance fit relationship.

[0074] It can be understood that, based on the foregoing setting, the limiting portion 300 can limit the connection between the shaft portion 100 and the hub portion 200 when the torque transmitted between the shaft portion 100 and the hub portion 200 is less than the preset torque, and release the limiting connection between the shaft portion 100 and the hub portion 200 when the torque transmitted between the shaft portion 100 and the hub portion 200 is greater than or equal to the preset torque. In actual application, the limiting portion 300 can have various implementation manners, for example, the limiting portion 300 can be arranged to be connected between the shaft portion 100 and the hub portion 200 and adapted to be deformed under external force, the deformation amplitude of the limiting portion 300 is small and the limiting portion 300 can be fixedly connected to the shaft portion 100 and the hub portion 200 when the torque transmitted between the shaft portion 100 and the hub portion 200 is less than the preset torque, so as to limit the connection between the shaft portion 100 and the hub portion 200, and the limiting portion 300 is in a state of large deformation and separated from or in a loose fit state with at least one of the shaft portion 100 and the hub portion 200 when the torque transmitted between the shaft portion 100 and the hub portion 200 is greater than or equal to the preset torque, so as to release the limiting connection between the shaft portion 100 and the hub portion 200 and enable the shaft portion 100 and the hub portion 200 to rotate relative to each other; or the limiting portion 300 can be arranged to be connected between the shaft portion 100 and the hub portion 200, and at least one of the shaft portion 100 and the hub portion 200 has a large friction coefficient with the limiting portion, so that the limiting portion 300 can be subjected to a large static friction force, the limiting portion 300 cannot overcome the static friction force to move relative to the shaft portion 100 or the hub portion 200 when the torque transmitted between the shaft portion 100 and the hub portion 200 is less than the preset torque, so as to limit the connection between the shaft portion 100 and the hub portion 200, and the limiting portion 300 can overcome the static friction force to move relative to the shaft portion 100 or the hub portion 200 when the torque transmitted between the shaft portion 100 and the hub portion 200 is greater than or equal to the preset torque, so as to release the limiting connection between the shaft portion 100 and the hub portion 200 and enable the shaft portion 100 and the hub portion 200 to rotate relative to each other; the limiting portion 300 can also have other implementation manners, which can be set according to actual needs, and will not be listed here.

[0075] It can be understood that the shaft portion 100 has a first torsion limit, the hub portion 200 has a second torsion limit, and the preset torque is less than the smaller one of the first torsion limit and the second torsion limit, so that in the case that the torque transmitted between the shaft portion 100 and the hub portion 200 increases and reaches the preset torque, structural damage of the shaft portion 100 or the hub portion 200 is avoided. The specific value of the preset torque can be set according to actual needs, and is not limited here.

[0076] In some examples, one of the shaft portion 100 and the hub portion 200 is provided with a connecting groove, and the limiting portion 300 is arranged on the other one of the shaft portion 100 and the hub portion 200 and is adapted to extend into or exit the connecting groove. In the limiting state, at least part of the limiting portion 300 is located in the connecting groove.

[0077] In this technical solution, the shaft portion 100 or the hub portion 200 can be provided with the connecting groove, and the limiting portion 300 can be arranged on the one of the shaft portion 100 and the hub portion 200 which is not provided with the connecting groove and is adapted to be structurally matched with the connecting groove. Accordingly, in the limiting state, at least part of the limiting portion 300 is located in the connecting groove, so that the shaft portion 100 and the hub portion 200 are limited in connection, so that the shaft portion 100 and the hub portion 200 can transmit torque through the limiting portion 300 and rotate synchronously.

[0078] In some examples, the shaft portion 100 is provided with a first connecting groove, and the connecting groove includes the first connecting groove. The first connecting groove is located on the circumferential side of the shaft portion 100. The limiting portion 300 is arranged on the hole wall of the connecting hole 201 and is adapted to extend into or exit the first connecting groove. In the limiting state, at least part of the limiting portion 300 is located in the first connecting groove. The length of the limiting portion 300 in the radial direction of the hub portion 200 is telescopic, and the length of the limiting portion 300 extending into the first connecting groove in the radial direction of the hub portion 200 decreases with the increase of the torque transmitted between the shaft portion 100 and the hub portion 200.

[0079] In the technical solution, the connecting groove can include a first connecting groove, the shaft part 100 can be provided with the first connecting groove, the limiting part 300 is arranged on the hole wall of the connecting shaft hole 201, and the limiting state and the unlocking state correspond to a state that at least part of the limiting part 300 is inserted into the first connecting groove and a state that the limiting part 300 exits the first connecting groove, respectively. The limiting part 300 can be inserted into or exit the first connecting groove in a telescopic manner along the radial direction of the hub part 200, and the length of the limiting part 300 along the radial direction of the hub part 200 when the limiting part 300 is inserted into the first connecting groove is negatively related to the torque transmitted between the shaft part 100 and the hub part 200. Based on the above arrangement, when the limiting part 300 transmits the torque between the shaft part 100 and the hub part 200, the length of the limiting part 300 along the radial direction of the hub part 200 changes with the change of the torque. On the one hand, when the torque transmitted between the shaft part 100 and the hub part 200 is less than a preset torque, the extrusion force on the limiting part 300 is relatively small, the length of the limiting part 300 is relatively large and the limiting part 300 can be kept in a state of being at least partially located in the first connecting groove, so that the shaft part 100 and the hub part 200 are limited and connected, and the shaft part 100 and the hub part 200 can rotate synchronously. On the other hand, when the torque transmitted between the shaft part 100 and the hub part 200 is greater than or equal to the preset torque, the extrusion force on the limiting part 300 is relatively large, the length of the limiting part 300 is contracted to a small state and the limiting part 300 exits the first connecting groove, so that the limiting and connecting relationship between the shaft part 100 and the hub part 200 is released, and the shaft part 100 and the hub part 200 can rotate relative to each other, thereby reducing the torque transmitted between the shaft part 100 and the hub part 200, avoiding structural damage of the shaft part 100 and the hub part 200, reducing the maintenance cost of the cleaning base station, and facilitating reducing the harm of the hub part 200 to the accidental touchers. On the other hand, the limiting part 300 can be arranged between the shaft part 100 and the hub part 200, so that the overload protection of the shaft part 100 and the hub part 200 can be performed while the structural compactness of the shaft-hub connecting structure 10 is improved. In addition, by arranging the limiting part 300 in a telescopic structure, the structural complexity of the limiting part 300 can be reduced, and the manufacturing cost of the shaft-hub connecting structure 10 can be reduced.

[0080] It can be understood that, in actual application, based on the shape design of the limiting part 300 and the first connecting groove, the direction of the force generated when the limiting part 300 contacts the groove wall of the first connecting groove can have a component along the radial direction of the shaft part 100, and the size of the force can be positively related to the size of the torque transmitted between the shaft part 100 and the hub part 200, so that the length of the limiting part 300 along the radial direction of the hub part 200 when the limiting part 300 is inserted into the first connecting groove can be reduced with the increase of the torque transmitted between the shaft part 100 and the hub part 200.

[0081] It is understood that the extension and retraction direction of the aforementioned limiting part 300 may include the radial direction of the aforementioned hub 200, or it may include other directions. When the limiting part 300 can extend and retract in a single direction, the extension and retraction direction of the limiting part 300 may be consistent with the radial direction of the hub 200, or the extension and retraction direction of the limiting part 300 may have a component in the radial direction of the hub 200. When the limiting part 300 can extend and retract in multiple directions, one of the multiple extension and retraction directions of the limiting part 300 may be consistent with the radial direction of the hub 200, or at least one extension and retraction direction of the limiting part 300 may have a component in the radial direction of the hub 200. Therefore, the extension and retraction direction of the limiting part 300 may be multiple, and no further limitations are imposed here.

[0082] It is understood that the aforementioned first connecting groove can be provided on the outer peripheral wall of the shaft portion 100.

[0083] like Figure 2 As shown, in some examples, the hub portion 200 is also provided with a second connecting groove 202. The aforementioned connecting groove includes the second connecting groove 202, which is located on the wall of the connecting shaft hole 201. The limiting portion 300 is disposed on the periphery of the shaft portion 100 and is adapted to extend into or out of the second connecting groove 202. In the limiting state, at least a portion of the limiting portion 300 is located within the second connecting groove 202. The length of the limiting portion 300 along the radial direction of the shaft portion 100 is telescopic, and the length of the limiting portion 300 extending into the second connecting groove 202 along the radial direction of the shaft portion 100 decreases as the torque transmitted between the shaft portion 100 and the hub portion 200 increases.

[0084] In the technical solution, the connecting groove can include a second connecting groove 202, the hub portion 200 can be provided with the second connecting groove 202, the limiting portion 300 is arranged on the circumferential side of the shaft portion 100, and the limiting state and the unlocking state correspond to a state in which at least part of the limiting portion 300 is inserted into the second connecting groove 202 and a state in which the limiting portion 300 exits the second connecting groove 202, respectively. The limiting portion 300 can extend into or exit the second connecting groove 202 in a telescopic manner along the radial direction of the shaft portion 100, and the length of the limiting portion 300 extending into the second connecting groove 202 along the radial direction of the shaft portion 100 is negatively related to the torque transmitted between the shaft portion 100 and the hub portion 200. Based on the foregoing arrangement, when the torque is transmitted between the shaft portion 100 and the hub portion 200 through the limiting portion 300, the length of the limiting portion 300 in the radial direction of the shaft portion 100 changes with the change of the torque. On the one hand, when the torque transmitted between the shaft portion 100 and the hub portion 200 is less than a preset torque, the extrusion force on the limiting portion 300 is relatively small, the length of the limiting portion 300 is relatively large, and the limiting portion 300 can at least partially remain in the second connecting groove 202, thereby limiting the connection between the shaft portion 100 and the hub portion 200, so that the shaft portion 100 and the hub portion 200 can rotate synchronously. On the other hand, when the torque transmitted between the shaft portion 100 and the hub portion 200 is greater than or equal to the preset torque, the extrusion force on the limiting portion 300 is relatively large, the length of the limiting portion 300 is contracted to a small state and exits the second connecting groove 202, thereby releasing the limiting connection relationship between the shaft portion 100 and the hub portion 200, so that the shaft portion 100 and the hub portion 200 can rotate relative to each other, thereby reducing the torque transmitted between the shaft portion 100 and the hub portion 200, avoiding structural damage of the shaft portion 100 and the hub portion 200, reducing the maintenance cost of the cleaning base station, and facilitating reduction of the damage of the hub portion 200 to an accidental toucher. On the other hand, the limiting portion 300 can be arranged between the shaft portion 100 and the hub portion 200, so as to improve the structural compactness of the shaft-hub connecting structure 10 while performing overload protection of the shaft portion 100 and the hub portion 200. In addition, by arranging the limiting portion 300 in a telescopic structure, the structural complexity of the limiting portion 300 can be reduced, and the manufacturing cost of the shaft-hub connecting structure 10 can be reduced.

[0085] It can be understood that, in actual application, the shape of the limiting portion 300 and the second connecting groove 202 can be designed such that, when the limiting portion 300 contacts the wall of the second connecting groove 202, the direction of the force generated by the contact has a component in the radial direction of the shaft portion 100, and the magnitude of the force is positively related to the torque transmitted between the shaft portion 100 and the hub portion 200, so that the length of the limiting portion 300 extending into the second connecting groove 202 along the radial direction of the shaft portion 100 decreases with the increase of the torque transmitted between the shaft portion 100 and the hub portion 200.

[0086] It can be understood that the extension direction of the limiting portion 300 can include the radial direction of the shaft portion 100, or other directions; when the extension direction of the limiting portion 300 is single, the extension direction of the limiting portion 300 can be consistent with the radial direction of the shaft portion 100, or the extension direction of the limiting portion 300 can be provided with a component in the radial direction of the shaft portion 100; when the limiting portion 300 can produce multi-directional extension, one of the multiple extension directions of the limiting portion 300 can be consistent with the radial direction of the shaft portion 100, or at least one of the extension directions of the limiting portion 300 can be provided with a component in the radial direction of the shaft portion 100; thus, the extension direction of the limiting portion 300 can be various, which is not limited here.

[0087] It can be understood that the limiting portion 300 can be arranged on the outer peripheral wall of the shaft portion 100.

[0088] In some examples, the limiting portion 300 is elastic and suitable for elastic deformation in the radial direction of the shaft portion 100 or the hub portion 200.

[0089] In this technical solution, when the shaft portion 100 is provided with the first connecting groove, the limiting portion 300 can be provided with elasticity and suitable for elastic deformation in the radial direction of the hub portion 200, so that the length of the limiting portion 300 in the radial direction of the hub portion 200 can be related to the elastic deformation amount of the limiting portion 300 in the radial direction of the hub portion 200; based on the foregoing arrangement, the limiting portion 300 can extend into or exit the first connecting groove by elastic deformation, which is beneficial to improve the sensitivity of the limiting portion 300 to external force, so that when the torque transmitted between the shaft portion 100 and the hub portion 200 is reduced to below the preset torque, the limiting portion 300 can have a tendency to stretch itself, which facilitates the limiting portion 300 to reinsert the first connecting groove, and is beneficial to improve the use and assembly convenience of the shaft-hub connecting structure 10.

[0090] Alternatively, when the hub portion 200 is provided with the second connecting groove 202, the limiting portion 300 can be provided with elasticity and suitable for elastic deformation in the radial direction of the shaft portion 100, so that the length of the limiting portion 300 in the radial direction of the shaft portion 100 can be related to the elastic deformation amount of the limiting portion 300 in the radial direction of the shaft portion 100; based on the foregoing arrangement, the limiting portion 300 can extend into or exit the second connecting groove 202 by elastic deformation, which is beneficial to improve the sensitivity of the limiting portion 300 to external force, so that when the torque transmitted between the shaft portion 100 and the hub portion 200 is reduced to below the preset torque, the limiting portion 300 can have a tendency to stretch itself, which facilitates the limiting portion 300 to reinsert the second connecting groove 202, and is beneficial to improve the use and assembly convenience of the shaft-hub connecting structure 10.

[0091] It can be understood that the elastic deformation amplitude and stiffness coefficient of the limiting part 300 can be set in combination with the torque transmission demand between the shaft hubs, which is not limited here.

[0092] As shown in Figures 1 to 3 some examples, the limiting part 300 includes an elastic piece 310 and a plug-in piece 320 connected to the elastic piece 310, and the plug-in piece 320 is formed with a connecting wall 301. In the case where the shaft part 100 is provided with a first connecting groove, the elastic piece 310 is connected between the hub part 200 and the plug-in piece 320, and the connecting wall 301 is used to abut against the groove wall of the first connecting groove. In the case where the hub part 200 is provided with a second connecting groove 202, the elastic piece 310 is connected between the shaft part 100 and the plug-in piece 320, and the connecting wall 301 is used to abut against the groove wall of the second connecting groove 202.

[0093] In this technical solution, the aforementioned limiting part 300 can include an elastic piece 310 and a plug-in piece 320, wherein the plug-in piece 320 is connected to the elastic piece 310 and the connecting wall 301 of the plug-in piece 320 is used to abut against the groove wall of the first connecting groove or the second connecting groove 202. In the case where the plug-in piece 320 abuts against the groove wall of the first connecting groove or the second connecting groove 202, the plug-in piece 320 can form a transmission relationship with the hub part 200. Accordingly, the shaft part 100 and the hub part 200 can transmit torque through the limiting part 300, so as to rotate synchronously and perform corresponding rotating actions. In the process of rotating the hub part 200 by the plug-in piece 320, the connecting wall 301 can be subjected to an acting force applied by the groove wall of the first connecting groove or the second connecting groove 202, and can press the elastic piece 310 under the action of the aforementioned acting force, so as to shorten the length of the elastic piece 310 in the radial direction of the hub part 200 or the shaft part 100. When the torque transmitted between the shaft part 100 and the hub part 200 through the limiting part 300 increases to a preset torque, the compression amount of the elastic piece 310 will reach a certain degree, so that the plug-in piece 320 exits the first connecting groove or the second connecting groove 202, thereby the cooperation relationship between the limiting part 300 and the first connecting groove or the second connecting groove 202 is released, and the torque that the limiting part 300 can transmit to the hub part 200 will be relatively reduced. Accordingly, it can be avoided that the shaft part 100 and the hub part 200 are subjected to a large torque, and the damage risk of the hub part 200 and other components in the transmission chain can be reduced. At the same time, based on the aforementioned setting, the elastic deformation of the limiting part 300 and the cooperation relationship between the limiting part 300 and the first connecting groove or the second connecting groove 202 can be respectively realized by the elastic piece 310 and the plug-in piece 320, thereby it is beneficial to keep the shape of the contact surface between the limiting part 300 and the first connecting groove or the second connecting groove 202 stable, and it is beneficial to transmit torque within a certain range between the shaft part 100 and the hub part 200 through the limiting part 300, so as to provide protection for the stable operation of the hub part 200.

[0094] It can be understood that the elastic deformation direction of the aforementioned elastic member 310 is different from the axial direction of the shaft portion 100 or the hub portion 200.

[0095] It can be understood that the normal direction of at least part of the position of the aforementioned connecting wall 301 is between the tangential direction and the radial direction of the shaft portion 100 or the hub portion 200 at the corresponding position, so that when the connecting wall 301 abuts against the slot wall of the first connecting slot or the second connecting slot 202, the force acting on the connecting wall 301 can have components in the tangential direction and the radial direction of the shaft portion 100 or the hub portion 200, so as to compress the elastic member 310 or maintain the transmission of torque.

[0096] It can be understood that the aforementioned elastic member 310 can be, but is not limited to, a spring.

[0097] It can be understood that the rigidity of the aforementioned plug-in member 320 can be greater than the rigidity of the aforementioned elastic member 310.

[0098] It can be understood that in the case that the shaft portion 100 is provided with the first connecting slot, the elastic member 310 can be arranged on the hole wall of the continuous shaft hole 201 of the hub portion 200; in the case that the hub portion 200 is provided with the second connecting slot 202, the elastic member 310 can be arranged on the peripheral wall of the shaft portion 100.

[0099] As shown in FIG. 1, Figures 1 to 3 In some examples, in the case that the shaft portion 100 is provided with the first connecting slot, the hole wall of the continuous shaft hole 201 is provided with a first mounting hole, the elastic member 310 is movably arranged in the first mounting hole, and at least part of the plug-in member 320 is located outside the first mounting hole when the elastic member 310 is in a relaxed state; in the case that the hub portion 200 is provided with the second connecting slot 202, the peripheral side of the shaft portion 100 is provided with a second mounting hole 101, the elastic member 310 is movably arranged in the second mounting hole 101, and at least part of the plug-in member 320 is located outside the second mounting hole 101 when the elastic member 310 is in a relaxed state.

[0100] In this technical solution, in the case that the shaft portion 100 is provided with the first connecting slot, the hole wall of the aforementioned continuous shaft hole 201 can be provided with a first mounting hole for accommodating the aforementioned elastic member 310, and correspondingly, the aforementioned elastic member 310 can be arranged in the aforementioned first mounting hole, so as to avoid the exposure of the elastic member 310 to the outside, prevent interference between the external structure and the elastic member 310, and facilitate the stable and reliable elastic deformation of the elastic member 310; at the same time, at least part of the aforementioned plug-in member 320 can be arranged outside the first mounting hole when the elastic member 310 is in a relaxed state, so as to facilitate the abutment of the plug-in member 320 against the first connecting slot of the shaft portion 100, and facilitate the torque transmission between the shaft portion 100 and the hub portion 200 through the limiting portion 300.

[0101] In the case where the hub portion 200 is provided with the second connecting groove 202, the peripheral side of the shaft portion 100 can be provided with a second mounting hole 101 for accommodating the elastic member 310, and correspondingly, the elastic member 310 can be arranged in the second mounting hole 101, so that the elastic member 310 can be prevented from being exposed to the outside, and interference between the external structure and the elastic member 310 can be prevented, and the elastic member 310 can be stably and reliably elastically deformed; at the same time, in the case where the elastic member 310 is in a relaxed state, at least part of the plug-in member 320 can be arranged outside the second mounting hole 101, so that the plug-in member 320 can be conveniently butted against the second connecting groove 202 of the hub portion 200, and the torque transmission between the shaft portion 100 and the hub portion 200 through the limiting portion 300 can be facilitated.

[0102] It can be understood that the elastic member 310 can have a relaxed state and a deformed state, wherein the relaxed state refers to a state in which the elastic member 310 is not compressed or stretched, and the deformed state refers to a state in which the elastic member 310 is elastically deformed under compression or stretching.

[0103] It can be understood that the second mounting hole 101 can be arranged on the outer peripheral wall of the shaft portion 100.

[0104] In some examples, the first mounting hole extends in the radial direction of the hub portion 200; and the second mounting hole 101 extends in the radial direction of the shaft portion 100.

[0105] In the technical solution, in the case where the hub portion 200 is provided with the first mounting hole, the first mounting hole can be arranged to extend in the radial direction of the hub portion 200, so that based on the above arrangement, the hub portion 200 can constrain the deformation direction of the elastic member 310 through the first mounting hole, so as to facilitate the elastic member 310 to elastically deform in the radial direction of the hub portion 200, and then facilitate the plug-in member 320 to extend into or exit the first connecting groove, and the consistency between the elastic deformation direction of the elastic member 310 and the radial direction of the hub portion 200 can be improved, and then in the case where the elastic deformation amplitude of the elastic member 310 is required to be the same, the size specification requirement of the elastic member 310 can be reduced, and the structural compactness of the shaft-hub connecting structure 10 can be improved.

[0106] In the case that the shaft portion 100 is provided with the second mounting hole 101, the second mounting hole 101 can extend along the radial direction of the shaft portion 100, so that, based on the foregoing arrangement, the shaft portion 100 can constrain the deformation direction of the elastic member 310 through the mounting hole 101, so as to facilitate the elastic member 310 to generate elastic deformation along the radial direction of the shaft portion 100, and then facilitate the plug-in part 320 to extend into or exit the second connecting groove 202, and can improve the consistency between the elastic deformation direction of the elastic member 310 and the radial direction of the shaft portion 100, and then in the case that the elastic deformation amplitude of the elastic member 310 is required to be the same, the size specification requirement of the elastic member 310 can be reduced, which is beneficial to improve the structural compactness of the shaft hub connecting structure 10.

[0107] As shown in Figure 3 In some examples, in the case that the shaft portion 100 is provided with the first connecting groove, in the projection plane perpendicular to the axial direction of the hub portion 200, the profile of the connecting wall 301 includes a convex curve segment, and the convex curve segment has an opening, and the opening is away from the axial position of the hub portion 200; in the case that the hub portion 200 is provided with the second connecting groove 202, in the projection plane perpendicular to the axial direction of the shaft portion 100, the profile of the connecting wall 301 includes a convex curve segment, and the convex curve segment has an opening, and the opening is toward the axial position of the shaft portion 100.

[0108] In this technical solution, the shape of the connecting wall 301 is constrained. Based on the foregoing arrangement, in the case that the shaft portion 100 is provided with the first connecting groove, on the one hand, when the connecting wall 301 is extruded, the extrusion force on the connecting wall 301 has components in the radial direction and the tangential direction of the shaft portion 100, so as to facilitate the limiting portion 300 to transmit torque through the connecting wall 301, and facilitate the elastic member 310 to generate elastic deformation along the radial direction of the shaft portion 100; on the other hand, the smoothness of the connecting wall 301 can also be improved, so that the connecting wall 301 is easy to abut against the first connecting groove or move relative to the first connecting groove, reduces the probability of the connecting wall 301 and the shaft portion 100 being stuck, and can reduce the frictional resistance between the connecting wall 301 and the shaft portion 100, which is beneficial to reduce the wear of the plug-in part 320 and the shaft portion 100, and prolong the service life of the plug-in part 320 and the shaft portion 100.

[0109] In the case that the hub portion 200 is provided with the second connecting groove 202, on the one hand, the extrusion force borne by the connecting wall 301 can have components in the radial direction and the tangential direction of the hub portion 200 when the connecting wall 301 is extruded, thereby facilitating the torque transmission of the limiting portion 300 through the connecting wall 301 and the elastic deformation of the elastic member 310 in the radial direction of the hub portion 200; on the other hand, the smoothness of the connecting wall 301 can also be improved, thereby facilitating the abutment of the connecting wall 301 with the second connecting groove 202 or the movement of the connecting wall 301 relative to the second connecting groove 202, reducing the probability of the occurrence of the jamming phenomenon between the connecting wall 301 and the hub portion 200, and reducing the frictional resistance between the connecting wall 301 and the hub portion 200, which is conducive to reducing the wear of the plug-in part 320 and the hub portion 200 and prolonging the service life of the plug-in part 320 and the hub portion 200.

[0110] As shown in Figure 3 In some examples, the convex curve segment is in the shape of a circular arc or a conic curve.

[0111] In this technical solution, the convex curve segment can be in the shape of a circular arc or a conic curve, thereby further improving the load-bearing performance of the connecting wall 301, reducing the damage probability of the plug-in part 320, and further improving the smoothness of the connecting wall 301.

[0112] It can be understood that, in the case that the convex curve segment is in the shape of a conic curve, the convex curve segment can be an elliptical arc segment, a hyperbolic curve segment, or a parabolic curve segment.

[0113] In some examples, the connecting wall 301 is in the shape of a spherical cap or an ellipsoidal cap.

[0114] In this technical solution, the connecting wall 301 can be in the shape of a spherical cap or an ellipsoidal cap, thereby based on the foregoing arrangement, on the one hand, the profile of the connecting wall 301 in the projection plane perpendicular to the axial direction of the shaft portion 100 or the hub portion 200 can include the convex curve segment; on the other hand, the profile of the connecting wall 301 in the cross section parallel to the axial direction of the shaft portion 100 can be in the shape of a circular arc or an elliptical arc that is open toward the position of the axis of the shaft portion 100, or the profile of the connecting wall 301 in the cross section parallel to the axial direction of the hub portion 200 can be in the shape of a circular arc or an elliptical arc that is open away from the position of the axis of the hub portion 200, thereby in the process of sleeving the hub portion 200 on the shaft portion 100, the connecting wall 301 can also play a good guiding role, facilitating the pressing of the shaft portion 100 into the shaft hole 201 of the hub portion 200, and being conducive to improving the assembly convenience between the hub portion 200 and the shaft portion 100.

[0115] Understandably, during the assembly process, if the connector 320 is misaligned with the first connecting groove or the second connecting groove 202, the elastic member 310 can be in a compressed state, which helps to reduce the interference of the limiting part 300 on the assembly process. When the connector 320 corresponds to the first connecting groove or the second connecting groove 202, the compression of the elastic member 310 can be reduced, thereby allowing the connector 320 to be ejected into the first connecting groove or the second connecting groove 202, which facilitates the cooperation between the connecting wall 301 and the first connecting groove or the second connecting groove 202, and improves the installation convenience of the hub 200.

[0116] In some examples, connector 320 is made of a rigid material.

[0117] In this technical solution, the connector 320 can be made of a rigid material, which can reduce the probability of the connector 320 undergoing large deformation, help maintain the shape stability of the connecting wall 301, reduce the risk of jamming between the connector 320 and the shaft 100 or hub 200, and improve the torque transmission performance of the limiting part 300, thereby enhancing the structural reliability and stability of the shaft-hub connection structure 10.

[0118] It is understood that the aforementioned connector 320 may be made of metal or plastic.

[0119] like Figures 1 to 3 As shown, in some examples, the shaft portion 100 has a second mounting hole 101. The shaft portion 100 includes: a shaft body 110, which has a mounting groove 102 and a second mounting hole 101, the mounting groove 102 communicating with the second mounting hole 101; and a cover 120, which is detachably disposed on the shaft body 110 and is used to open or cover the opening of the mounting groove 102.

[0120] In this technical solution, the aforementioned shaft portion 100 may include a shaft body 110 and a cover 120. The aforementioned second mounting hole 101 is formed in the aforementioned shaft body 110, and the shaft body 110 is also provided with a mounting groove 102 communicating with the second mounting hole 101. The cover 120 is detachably connected to the shaft body 110 and is used to open or cover the opening of the mounting groove 102. Based on the aforementioned configuration, during the assembly of the shaft portion 100 and the limiting portion 300, the components of the limiting portion 300 can be installed through the mounting groove 102, which is beneficial to improving the installation convenience of the limiting portion 300, thereby reducing the assembly difficulty of the shaft hub connection structure 10 and facilitating the maintenance and replacement of the limiting portion 300.

[0121] In some examples, the number of the limiting portions 300 and the number of the connecting slots are multiple, the multiple limiting portions 300 are uniformly arranged along the circumference of one of the shaft portion 100 and the hub portion 200, and the multiple connecting slots are uniformly arranged along the circumference of the other of the shaft portion 100 and the hub portion 200; wherein the number of the limiting portions 300 is the same as and one-to-one corresponding to the number of the connecting slots; or the number of the connecting slots is greater than the number of the limiting portions 300, and the interval angle between the adjacent two limiting portions 300 is an integer multiple of the interval angle between the adjacent two connecting slots.

[0122] In the technical solution, the number of the limiting portions 300 and the number of the connecting slots and the corresponding relationship are constrained; based on the foregoing setting, in the case that the number of the limiting portions 300 is the same as and one-to-one corresponding to the number of the connecting slots, the number of the slots of the shaft portion 100 or the hub portion 200 can be reduced, so as to ensure the structural strength of the shaft portion 100 or the hub portion 200, and facilitate to reduce the manufacturing difficulty of the shaft portion 100 or the hub portion 200, thereby saving the use cost of the shaft-hub connecting structure 10.

[0123] In the case that the number of the connecting slots is greater than the number of the limiting portions 300, and the interval angle between the adjacent two limiting portions 300 is an integer multiple of the interval angle between the adjacent two connecting slots, the limiting portions 300 and the connecting slots are more likely to form a cooperation relationship, so as to facilitate the assembly between the shaft portion 100 and the hub portion 200.

[0124] Meanwhile, by means of uniformly arranging the multiple limiting portions 300 and the multiple connecting slots along the circumferences of the shaft portion 100 and the hub portion 200 respectively, the stress uniformity of the shaft portion 100 and the hub portion 200 can be improved in the foregoing limiting state, so as to provide a guarantee for the stable transmission of the torque between the shaft portion 100 and the hub portion 200.

[0125] It can be understood that, in the technical solution, in the case that the connecting slots include the foregoing first connecting slots, the number of the first connecting slots is multiple, and the number of the connecting slots is the total number of the first connecting slots; in the case that the connecting slots include the foregoing second connecting slots 202, the number of the second connecting slots 202 is multiple, and the number of the connecting slots is the total number of the second connecting slots 202.

[0126] In some examples, the limiting portions 300 are made of a flexible elastic material.

[0127] In the technical solution, the foregoing limiting portions 300 can be made of a flexible elastic material, so as to improve the elastic deformation capability of the limiting portions 300, facilitate the deformation of the limiting portions 300 under a large torque, thereby releasing the limiting of the shaft portion 100 and the hub portion 200, and thereby reducing the damage risk of the shaft-hub connecting structure 10.

[0128] It can be understood that the foregoing flexible elastic material can be but is not limited to a soft glue material.

[0129] In some examples, the elastic member 310 includes an elastic buckle arranged on the circumferential side of one of the shaft portion 100 and the hub portion 200, and the circumferential side of the other of the shaft portion 100 and the hub portion 200 is formed with a clamping groove, and the elastic buckle is clamped in the clamping groove.

[0130] In the technical solution, the elastic member 310 can include an elastic buckle arranged on the circumferential side of the shaft portion 100 or the hub portion 200, and the one of the shaft portion 100 or the hub portion 200 which is not arranged with the elastic buckle is formed with the clamping groove, so that the limiting portion 300 can be connected to the shaft portion 100 and the hub portion 200 in a clamping manner, which is beneficial to improve the torque transmission performance between the shaft portion 100 and the hub portion 200.

[0131] It can be understood that the outer circumferential wall of the shaft portion 100 can be arranged with one of the elastic buckle and the clamping groove; and the hole wall of the shaft hole 201 can be arranged with the other of the elastic buckle and the clamping groove.

[0132] For example, the elastic buckle can have a sheet structure, and the elastic buckle extends in the radial direction of the shaft portion 100 or the hub portion 200. Correspondingly, the clamping groove is adapted to the shape of the elastic buckle and extends in the radial direction of the shaft portion 100 or the hub portion 200, so that in the case that the elastic buckle is subjected to torque, the elastic buckle can be elastically bent to shorten the length change of the elastic buckle in the radial direction of the shaft portion 100, so as to facilitate the elastic buckle to exit the clamping groove.

[0133] As shown in FIG. 1, according to a second aspect of the embodiments of the present disclosure, a cleaning base station 1a is provided, which comprises the shaft-hub connecting structure 10 according to any one of the first aspect. Figure 6 For example, as shown in FIG. 1, the hub portion 200 of the shaft-hub connecting structure 10 can be configured as a scrubbing member, and the shaft portion 100 can be configured as a rotating shaft for driving the scrubbing member to rotate. It can be understood that in addition to the foregoing example, other components in the cleaning base station 1a that have a shaft-hub cooperation relationship can also adopt the shaft-hub connecting structure 10 according to any one of the first aspect.

[0134] Figure 6 In addition, since the cleaning base station 1a provided by the embodiments of the present disclosure comprises the shaft-hub connecting structure 10 according to any one of the first aspect, it has all the beneficial effects of the shaft-hub connecting structure 10, which will not be repeated here.

[0135] As shown in FIG. 2, according to a third aspect of the embodiments of the present disclosure, a cleaning robot 1b is provided, which comprises the shaft-hub connecting structure 10 according to any one of the first aspect.

[0136] As shown in FIG. 2, according to a third aspect of the embodiments of the present disclosure, a cleaning robot 1b is provided, which comprises the shaft-hub connecting structure 10 according to any one of the first aspect. Figure 7 As shown in FIG. 2, according to a third aspect of the embodiments of the present disclosure, a cleaning robot 1b is provided, which comprises the shaft-hub connecting structure 10 according to any one of the first aspect.​

[0137] Exemplarily, as shown in Figure 7 The hub portion 200 of the shaft-hub connection structure 10 can be configured as a mop, and the shaft portion 100 can be configured as a rotating shaft for driving the mop to rotate. It can be understood that, in addition to the foregoing example, other components in the cleaning robot 1b that have a shaft-hub cooperation relationship can also adopt the shaft-hub connection structure 10 proposed in any one of the foregoing aspects.

[0138] In addition, since the cleaning robot 1b provided by the embodiments of the present disclosure comprises the shaft-hub connection structure 10 proposed in any one of the foregoing aspects, the cleaning robot 1b has all the beneficial effects of the shaft-hub connection structure 10, which will not be described herein.

[0139] According to a fourth aspect of the embodiments of the present disclosure, a cleaning system is provided, comprising: the cleaning base station proposed in any one of the foregoing aspects; and / or the cleaning robot proposed in any one of the foregoing aspects.

[0140] Since the cleaning system provided by the embodiments of the present disclosure comprises the cleaning base station proposed in any one of the foregoing aspects and / or the cleaning robot proposed in any one of the foregoing aspects, the cleaning system has all the beneficial effects of the cleaning base station and / or the cleaning robot, which will not be described herein.

[0141] In the present disclosure, the terms "first", "second", "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, can also be detachable connection, or integral connection; "connecting" can be direct connection, or indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0142] In the description of the present disclosure, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the purpose of facilitating the description of the present disclosure and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, cannot be understood as a limitation on the present disclosure.

[0143] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "certain embodiments", and the like is intended to indicate that the described implementation, feature, structure, material or characteristic is included in at least one embodiment or example of the present disclosure. The illustrative representations of the above terms in the specification are not necessarily referring to the same embodiment or example. Moreover, the described implementation, feature, structure, material or characteristic can be combined in any one or more embodiments or examples in a suitable manner.

[0144] The above only is the preferred embodiment of the present disclosure, and is not intended to limit the present disclosure. The present disclosure can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A hub connection structure (10) characterized by, The shaft part (100) is arranged in the shaft hole (201) of the hub part (200). The limiting part (300) has a limiting state and an unlocking state. In the limiting state, the limiting part (300) forms a limiting connection between the shaft part (100) and the hub part (200), so that the shaft part (100) and the hub part (200) can rotate synchronously. When the torque transmitted between the shaft part (100) and the hub part (200) increases to a preset torque, the limiting part (300) switches from the limiting state to the unlocking state, so that the shaft part (100) and the hub part (200) can rotate relative to each other.

2. The shaft-hub connecting structure (10) according to claim 1, wherein One of the shaft part (100) and the hub part (200) is provided with a connecting groove, and the limiting part (300) is arranged on the other of the shaft part (100) and the hub part (200) and is adapted to extend into or out of the connecting groove. In the limiting state, at least part of the limiting part (300) is located in the connecting groove.

3. The shaft-hub connecting structure (10) according to claim 2, wherein The shaft part (100) is provided with a first connecting groove, the connecting groove includes the first connecting groove, the first connecting groove is located on the circumferential side of the shaft part (100), and the limiting part (300) is arranged on the hole wall of the shaft hole (201) and is adapted to extend into or out of the first connecting groove. In the limiting state, at least part of the limiting part (300) is located in the first connecting groove. The length of the limiting part (300) in the radial direction of the hub part (200) is telescopic, and the length of the limiting part (300) extending into the first connecting groove in the radial direction of the hub part (200) decreases as the torque transmitted between the shaft part (100) and the hub part (200) increases.

4. The shaft-hub connecting structure (10) according to claim 2, wherein The hub part (200) is provided with a second connecting groove (202), the connecting groove includes the second connecting groove (202), the second connecting groove (202) is located on the hole wall of the shaft hole (201), and the limiting part (300) is arranged on the circumferential side of the shaft part (100) and is adapted to extend into or out of the second connecting groove (202). In the limiting state, at least part of the limiting part (300) is located in the second connecting groove (202). The length of the limiting part (300) in the radial direction of the shaft part (100) is telescopic, and the length of the limiting part (300) extending into the second connecting groove (202) in the radial direction of the shaft part (100) decreases as the torque transmitted between the shaft part (100) and the hub part (200) increases.

5. The shaft-hub connecting structure (10) according to claim 3 or 4, wherein The limiting part (300) is elastic and suitable for elastic deformation in the radial direction of the shaft part (100) or the hub part (200).

6. The hub connection structure (10) according to claim 5, characterized in that The limiting part (300) comprises: an elastic member (310); a plug (320) connected to the elastic member (310), the plug (320) being formed with a connecting wall (301); In the case that the shaft part (100) is provided with a first connecting groove, the elastic member (310) is connected between the hub part (200) and the plug (320), and the connecting wall (301) is used for abutting against the groove wall of the first connecting groove; in the case that the hub part (200) is provided with a second connecting groove (202), the elastic member (310) is connected between the shaft part (100) and the plug (320), and the connecting wall (301) is used for abutting against the groove wall of the second connecting groove (202).

7. The shaft-hub connecting structure (10) according to claim 6, wherein, in the case that the shaft part (100) is provided with a first connecting groove, a hole wall of the shaft hole (201) is provided with a first mounting hole, the elastic member (310) is movably arranged in the first mounting hole, and at least part of the plug (320) is located outside the first mounting hole when the elastic member (310) is in a relaxed state; in the case that the hub part (200) is provided with a second connecting groove (202), a circumferential side of the shaft part (100) is provided with a second mounting hole (101), the elastic member (310) is movably arranged in the second mounting hole (101), and at least part of the plug (320) is located outside the second mounting hole (101) when the elastic member (310) is in a relaxed state.

8. The shaft-hub connecting structure (10) according to claim 7, wherein, the first mounting hole extends in the radial direction of the hub part (200); the second mounting hole (101) extends in the radial direction of the shaft part (100).

9. The shaft-hub connecting structure (10) according to claim 6, wherein, in the case that the shaft part (100) is provided with a first connecting groove, in a projection plane perpendicular to the axial direction of the hub part (200), the profile of the connecting wall (301) comprises a convex curve segment, the convex curve segment has an opening, and the opening is away from the axial center position of the hub part (200); in the case that the hub part (200) is provided with a second connecting groove (202), in a projection plane perpendicular to the axial direction of the shaft part (100), the profile of the connecting wall (301) comprises a convex curve segment, the convex curve segment has an opening, and the opening is toward the axial center position of the shaft part (100).

10. The shaft-hub connecting structure (10) according to claim 9, wherein, the convex curve segment is in the shape of a circular arc or a conic curve.

11. The shaft-hub connecting structure (10) according to claim 9, wherein, the connecting wall (301) is in the shape of a spherical cap or an ellipsoidal cap.

12. The shaft-hub connecting structure (10) according to claim 6, characterized in that, the spigot (320) is made of a hard material.

13. The boss connection structure (10) according to claim 7, characterized in that the shaft portion (100) is provided with the second mounting hole (101), and the shaft portion (100) comprises: a shaft body (110) provided with a mounting groove (102) and the second mounting hole (101), the mounting groove (102) being communicated with the second mounting hole (101); a cover (120) detachably arranged on the shaft body (110), the cover (120) being used for opening or covering the slot opening of the mounting groove (102).

14. The shaft-hub connecting structure (10) according to claim 2, characterized in that, the number of the limiting portions (300) and the number of the connecting grooves are plural, the plurality of limiting portions (300) are uniformly arranged along the circumference of one of the shaft portion (100) and the hub portion (200), and the plurality of connecting grooves are uniformly arranged along the circumference of the other of the shaft portion (100) and the hub portion (200); wherein the number of the limiting portions (300) is the same as and one-to-one corresponds to the number of the connecting grooves; or the number of the connecting grooves is greater than the number of the limiting portions (300), and the interval angle between two adjacent limiting portions (300) is an integer multiple of the interval angle between two adjacent connecting grooves.

15. The shaft-hub connecting structure (10) according to any one of claims 1 to 4, characterized in that, the limiting portion (300) is made of a soft and elastic material.

16. The boss connection structure (10) according to claim 1, characterized in that the limiting portion (300) comprises: an elastic buckle arranged on the circumferential side of one of the shaft portion (100) and the hub portion (200), and a clamping groove is formed on the circumferential side of the other of the shaft portion (100) and the hub portion (200), and the elastic buckle is clamped in the clamping groove.

17. A cleaning base station, characterized by, comprising: the shaft-hub connecting structure (10) according to any one of claims 1 to 16.

18. A cleaning robot, characterized in that, comprising: the shaft-hub connecting structure (10) according to any one of claims 1 to 16.

19. A cleaning system characterized by, comprising: the cleaning base station according to claim 17; and / or the cleaning robot according to claim 18.

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