Cleaning assembly and cleaning device

Abstract

The present application relates to the technical field of cleaning assemblies, and provides a cleaning assembly and a cleaning device. The cleaning assembly comprises a mounting frame, a swing arm, and a power assembly; the mounting frame is configured for being connected to a main body of the cleaning device, and a wall surface of the mounting frame is provided with a mating surface; the swing arm is rotatably connected to the mounting frame, and the swing arm is provided with a rotatable cleaning cleaning element; a power assembly drives rotation of the cleaning element, and the power assembly drives the swing arm and the mounting frame to rotate relative to each other, so as to drive the swing arm to move between a retracted position and an extended position; an output end of the power assembly driving the swing arm and the mounting frame to rotate relative to each other comprises a friction wheel. The cleaning assembly of the present application comprises a mounting frame and a swing arm capable of rotating relative to one another, wherein the mounting frame and the swing arm are driven to rotate relative to each other by means of a power assembly, resulting in a change in a cleaning range of a cleaning element, increasing the cleaning range, reducing cleaning dead zones, and improving cleaning performance.

Description

A cleaning component and cleaning equipment

[0001] Cross-reference to related applications

[0002] This invention claims the benefit of Chinese Patent Application No. 202520172019.8, filed on January 25, 2025, the contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of cleaning component technology, specifically to a cleaning component and cleaning equipment. Background Technology

[0004] Cleaning equipment includes robotic vacuum cleaners, robotic mops, robotic vacuum and mop combos, and floor scrubbers. With the improvement of living standards, the application of cleaning equipment in homes is becoming increasingly widespread, and the requirements are also getting higher. Existing cleaning equipment, when cleaning special areas such as indoor corners, suffers from blind spots due to its size; the cleaning components cannot cover the surface to be cleaned, resulting in incomplete cleaning and affecting cleaning effectiveness and user experience. Summary of the Invention

[0005] In view of the problems existing in the prior art, this application provides a cleaning component and cleaning equipment to improve the problems of large blind spots and incomplete cleaning when cleaning special areas such as corners.

[0006] To achieve the above and other related objectives, a first aspect of this application provides a cleaning assembly, including a fixed frame, a swing arm, and a power assembly; the fixed frame is configured to be connected to the main body of a cleaning device, and the wall surface of the fixed frame is provided with a mating surface; the swing arm is rotatably connected to the fixed frame, and the swing arm is provided with a rotatable cleaning component; the power assembly drives the cleaning component to rotate, and the power assembly drives the swing arm to rotate relative to the fixed frame, thereby causing the swing arm to move between a retracted position and an extended position; the output end of the power assembly driving the swing arm to rotate relative to the fixed frame includes a friction wheel; wherein, when the friction wheel abuts against the mating surface and the friction wheel rotates, there is a force between the friction wheel and the mating surface, causing the friction wheel to roll along the mating surface, thereby causing the swing arm to rotate relative to the fixed frame; when the swing arm is in the retracted and extended positions, the friction wheel does not abut against the mating surface.

[0007] The cleaning component of this application includes a relatively rotatable fixed frame and a swing arm. The fixed frame and the swing arm are driven to rotate relative to each other by a power component, thereby changing the cleaning range of the cleaning component. When cleaning ordinary surfaces, the swing arm is in the retracted position; when cleaning special areas such as corners, the swing arm is in the extended position, thus cleaning areas that cannot be covered by the conventional cleaning component, increasing the cleaning range, reducing blind spots, and improving the cleaning effect.

[0008] When the swing arm is in the retracted or extended position, the friction wheel continues to rotate. By preventing the swing arm from contacting the contact surface in the retracted and extended positions, friction between the swing arm and the contact surface is avoided, reducing wear on the friction wheel and the contact surface, extending their service life, and improving the durability of the cleaning equipment.

[0009] In an exemplary embodiment of this application, the power assembly includes a drive member, a first transmission assembly, and a second transmission assembly; the first transmission assembly drives the swing arm to rotate relative to the fixed frame under the drive of the drive member; the second transmission assembly drives the cleaning component to rotate under the drive of the drive member.

[0010] The driving component drives the first transmission assembly to rotate the swing arm relative to the fixed frame, and the driving component drives the second transmission assembly to rotate the cleaning component. The two functions of swing arm rotation and cleaning component rotation are realized by a single driving component, which improves the utilization rate of the driving component, reduces the number of driving components, and lowers the cost; it saves space for the cleaning component, facilitates the internal structure design of the cleaning component, and is conducive to the miniaturization and integration of the cleaning component and cleaning equipment, thereby helping to reduce cleaning blind spots.

[0011] In an exemplary embodiment of this application, the cleaning assembly has a regular cleaning mode and a special cleaning mode. In the regular cleaning mode, the swing arm is in a retracted position, and in the special cleaning mode, the swing arm is in an extended position. The driving member includes a rotation output shaft. In the regular cleaning mode, the rotation output shaft rotates in a first clockwise direction, and in the special cleaning mode, the rotation output shaft rotates in a second clockwise direction. When the rotation direction of the rotation output shaft changes from the first clockwise direction to the second clockwise direction, the cleaning assembly switches from the regular cleaning mode to the special cleaning mode. When the rotation direction of the rotation output shaft changes from the second clockwise direction to the first clockwise direction, the cleaning assembly switches from the special cleaning mode back to the regular cleaning mode.

[0012] The cleaning mode of the cleaning component can be changed by altering the rotation direction of the output shaft, making it easy to control and implement. The switching between regular and special cleaning modes is stable, controllable, and convenient.

[0013] In an exemplary embodiment of this application, the cleaning component rotates in the same clockwise direction in both the special cleaning mode and the regular cleaning mode.

[0014] Changing the rotation direction of the cleaning components can cause previously cleaned dust and particles to re-contaminate the cleaning surface and easily lead to dust re-spreading. Furthermore, it can prevent dust and other contaminants from being carried to the designated area of ​​the cleaning components, resulting in the dirt remaining unremoved. Maintaining a consistent clockwise rotation of the cleaning components facilitates the removal of dust, particles, and other debris. The cleaning components maintain consistency in both regular and special cleaning modes, which helps to remove dust, particles, and other debris and allow them to be temporarily sucked in and stored by the cleaning equipment.

[0015] In an exemplary embodiment of this application, the accommodating surface protrudes from the wall of the fixing frame.

[0016] By having the contact surface protrude from the wall, the friction wheel does not come into contact with the wall when it moves to the sides of the contact surface. This avoids friction between the swing arm and the wall when it is in the extended or retracted position, reduces wear on the friction wheel and the wall of the mounting bracket, extends the service life of the friction wheel, and improves the durability of the cleaning equipment.

[0017] In an exemplary embodiment of this application, the mating surface includes a first mating surface and a second mating surface, projected along the axial direction of the friction wheel. The first end of the projection of the first mating surface extends beyond the first end of the projection of the second mating surface, and the second end of the projection of the second mating surface extends beyond the second end of the projection of the first mating surface. The first end and the second end are opposite ends. The power component includes an external swing transmission component, which drives the friction wheel to move along the axial direction of the friction wheel, so that the friction wheel abuts against the first mating surface and the second mating surface respectively.

[0018] Two mating surfaces, a first mating surface and a second mating surface, are provided along the axial direction of the friction wheel. The friction wheel moves axially and comes into contact with both surfaces. The position of the swing arm is switched by rotating the friction wheel in different clockwise directions. The first end of the first mating surface extends beyond the first end of the second mating surface, and the second end of the second mating surface extends beyond the second end of the second mating surface. The first and second ends are opposite ends of the mating surfaces. When the swing arm is in the extended or retracted position, the friction wheel is located at either the first or second end of the second mating surface; that is, the friction wheel does not come into contact with either the first or second mating surface. When a position switch is required, the friction wheel is controlled to move axially, moving from either the first end of the second mating surface to the point of contact with the first mating surface, or from the second end of the first mating surface to the point of contact with the second mating surface. The friction wheel then moves relative to either the first or second mating surface, driving the swing arm to move.

[0019] In an exemplary embodiment of this application, when the swing arm is in the retracted position, the friction wheel is located beside the second end of the first mating surface, and the friction wheel can abut against the second mating surface after moving along the axial direction of the friction wheel; when the swing arm is in the extended position, the friction wheel is located beside the first end of the second mating surface, and the friction wheel can abut against the first mating surface after moving along the axial direction of the friction wheel.

[0020] When the swing arm is in the retracted and extended positions, the friction wheel does not come into contact with either the first or second mating surface, thus avoiding wear caused by relative movement between the friction wheel and the first or second mating surface and extending the service life of the friction wheel, the first mating surface, and the second mating surface.

[0021] In an exemplary embodiment of this application, the external swing transmission assembly includes: a wheel axle, one of which, along with the friction wheel, is provided with a helical toothed groove along the axial direction of the wheel axle, and the other is provided with teeth that engage with the toothed groove; a first stop portion disposed within and / or outside the toothed groove; and a second stop portion disposed within and / or outside the toothed groove; wherein the friction wheel is provided with teeth that engage with the toothed groove, and the teeth move along the toothed groove to cause the friction wheel to move along the axial direction of the wheel axle; the first stop portion and the second stop portion limit the stroke of the friction wheel moving along the axial direction of the wheel axle.

[0022] The tooth groove can be located on the outer wall of the axle or on the inner wall of the friction wheel near the axle. The teeth and the tooth groove mesh, causing the friction wheel to rotate relative to the axle, which in turn causes the friction wheel to move along its axial direction. This adjusts the relative position of the friction wheel with the first and second mating surfaces, allowing the friction wheel to move between them. When the friction wheel moves to the end of the axle and is restricted by the first or second stop, the rotation of the axle drives the friction wheel to rotate synchronously. The force between the friction wheel and the first or second mating surface causes the friction wheel to roll along the first or second mating surface, driving the swing arm to move relative to the fixed frame until the swing arm switches between the retracted and extended positions.

[0023] The first and second stops can be positioned inside the tooth groove to block it and restrict the movement of the teeth along the groove; alternatively, they can be positioned outside the tooth groove to directly restrict the position of the friction wheel, thereby allowing the friction wheel to rotate synchronously with the axle. The first and second stops can also be positioned inside and outside the tooth groove, respectively, to restrict the relative position of the friction wheel and the axle.

[0024] In an exemplary embodiment of this application, the first stop portion and the second stop portion are disposed at both ends of the tooth groove. The first stop portion and the second stop portion restrict the movement of the tooth along the tooth groove, thereby restricting the travel of the friction wheel along the wheel shaft axial direction.

[0025] The first and second stop parts are located at both ends of the tooth groove to block the tooth groove, thereby improving the situation where the friction wheel rotates relative to the wheel axle when it reaches the limit position, and ensuring that the friction wheel rotates synchronously with the wheel axle.

[0026] In an exemplary embodiment of this application, the external swing transmission assembly includes: a first elastic member, which applies a force to the friction wheel and the axle to reduce the pressure between them, thereby reducing the friction between the friction wheel and the axle.

[0027] The friction wheel itself has a certain weight, and under the action of gravity, there is a certain pressure between the friction wheel and the axle, resulting in friction between them. When the axle rotates, the friction wheel tends to rotate with the axle under the action of friction, thus affecting the relative rotation between the friction wheel and the axle. The first elastic element can reduce the friction between the friction wheel and the axle, thereby allowing the friction wheel to rotate relative to the axle. The friction wheel slides along the tooth groove of the axle, realizing the movement of the friction wheel in the axial direction relative to the axle, and completing the switching between the first and second mating surfaces of the friction wheel.

[0028] In an exemplary embodiment of this application, a retaining ring is provided on the side of the friction wheel near the first elastic member. The retaining ring rotates with the friction wheel, and the first elastic member presses against the retaining ring.

[0029] When the friction wheel and the axle rotate relative to each other, the retaining ring rotates relative to the friction wheel, thereby reducing the torsion of the first elastic element, reducing the probability of torsional damage to the first elastic element, extending the service life of the first elastic element, and improving the durability of the first elastic element.

[0030] In an exemplary embodiment of this application, when the friction wheel rotates relative to the wheel shaft, the torque of the frictional force between the retaining ring and the friction wheel acting on the retaining ring is not greater than the torque of the first elastic element twisting to a threshold angle.

[0031] The friction between the retaining ring and the friction wheel is small, which reduces the force exerted by the retaining ring on the first elastic element. This reduces the torsion of the first elastic element, prevents the torsion angle of the first elastic element from exceeding the threshold angle, reduces the probability of damage to the first elastic element, and effectively improves the service life of the first elastic element.

[0032] In an exemplary embodiment of this application, a limiting ring is provided on the side of the retaining ring near the first elastic member, and the first elastic member is sleeved outside the limiting ring.

[0033] The first elastic element is sleeved outside the limiting ring, which plays a role in positioning and limiting the first elastic element, reducing the shaking of the first elastic element, and preventing the first elastic element from abutting against the wheel axle and interfering with the movement of the friction wheel.

[0034] In an exemplary embodiment of this application, the swing arm is provided with an elastic element mounting portion, and the end of the first elastic element away from the friction wheel abuts against the elastic element mounting portion.

[0035] The elastic element mounting part is set on the swing arm to facilitate the installation of the first elastic element, so as to limit the first elastic element and reduce the shaking of the first elastic element.

[0036] In an exemplary embodiment of this application, the first elastic element is sleeved outside the axle, the elastic element mounting portion is disposed on the upper housing of the swing arm, and the axle extends through the elastic element mounting portion into the swing arm.

[0037] The first elastic element is sleeved outside the wheel axle. One end of the first elastic element presses against the elastic element mounting part, and the other end presses directly or indirectly against the friction wheel, so as to provide more uniform and stable support for the friction wheel.

[0038] In an exemplary embodiment of this application, the elastic member mounting portion is provided with a limiting protrusion on the side facing the friction wheel, and the first elastic member is sleeved on the limiting protrusion.

[0039] The first elastic element is sleeved outside the limiting protrusion, which can reduce the shaking of the first elastic element and improve the problem of the first elastic element shaking to the point that the wheel axle interferes with the movement of the friction wheel.

[0040] In an exemplary embodiment of this application, the outer wall of the axle is provided with a helical groove along the axle axis, and the friction wheel is provided with teeth that cooperate with the groove; a cover plate is fixed to the end of the axle, and the outer diameter of the cover plate is larger than the outer diameter of the axle; the first stop portion is provided on the cover plate and extends toward the axle to block one end of the groove.

[0041] The length of the tooth groove along the axle axis is positively correlated with the required stroke of the friction wheel. With the tooth groove located on the axle, the axial height of the friction wheel can be kept relatively small, thus reducing its space occupation and effectively lowering the volume of the cleaning assembly, facilitating its internal space layout. The cover plate further limits the friction wheel, preventing it from detaching from the axle during relative rotation. A first stop is located on the cover plate and extends towards the axle. Compared to placing the first stop in the tooth groove on the axle, placing it on the cover plate is easier to process, reduces manufacturing costs, and facilitates the screwing of the friction wheel into the tooth groove from the end of the axle near the cover plate, simplifying the assembly of the friction wheel and axle.

[0042] In an exemplary embodiment of this application, a second elastic member is included, one end of which is disposed on the swing arm and the other end of which is disposed on the fixed frame; wherein, when the swing arm is in the retracted position, the second elastic member applies a force to the swing arm with a rotational tendency in a third clockwise direction, so as to cause the friction wheel to disengage from the mating surface, the third clockwise direction being the rotational direction of the swing arm from the extended position to the retracted position; when the swing arm is in the extended position, the second elastic member applies a force to the swing arm with a rotational tendency in a fourth clockwise direction, so as to cause the friction wheel to disengage from the mating surface, the fourth clockwise direction being the rotational direction of the swing arm from the retracted position to the extended position.

[0043] When the cleaning component moves from the retracted position to the extended position, the force between the friction wheel and the second mating surface causes the friction wheel to roll along the second mating surface. When the friction wheel moves to the end of the second mating surface, it partially contacts the surface. However, the force between the friction wheel and the second mating surface is insufficient to completely disengage them; that is, there is always a certain force between the friction wheel and the end of the second mating surface. This can lead to problems such as swing arm vibration, friction wheel wear, and second mating surface wear. The force applied to the swing arm by the second elastic element allows the friction wheel to completely disengage from the second mating surface, thereby reducing swing arm vibration, preventing wear on the friction wheel and the second mating surface, and extending their service life. Simultaneously, the second elastic element applies a continuous force to the swing arm, reducing swing arm swaying during cleaning and preventing the swing arm from retracting. Even if the cleaning component is squeezed or bumped against a wall or other surface during cleaning, causing the swing arm to rotate towards the retracted position, the second elastic element will promptly return the cleaning component to the extended position.

[0044] Similarly, when the module changes from the extended position to the retracted position, the friction wheel contacts the edge of the first contact surface. The friction wheel cannot completely disengage from the first contact surface. The second elastic element applies a force to the swing arm in the third clockwise direction, causing the swing arm to move towards the retracted position. The friction wheel completely disengages from the first contact surface, reducing the swaying of the swing arm, reducing the wear between the friction wheel and the first contact surface, and improving the service life.

[0045] In an exemplary embodiment of this application, when the friction wheel rolls along the mating surface to the edge of the mating surface, the torque exerted by the second elastic element on the swing arm is greater than or equal to the resistance torque of the swing arm moving in the direction of the friction wheel separating from the mating surface.

[0046] When the torque exerted by the second elastic element on the swing arm is greater than the resistance torque of the swing arm moving in the direction of the friction wheel separating from the mating surface, the second elastic element can cause the swing arm to separate from the mating surface; when the torque exerted by the second elastic element on the swing arm is equal to the resistance torque of the swing arm moving in the direction of the friction wheel separating from the mating surface, the swing arm will continue to move under the action of inertia, thereby causing the friction wheel to separate from the mating surface, effectively ensuring that the friction wheel can separate from the mating surface in both the extended and retracted positions, reducing the wear between the friction wheel and the mating surface.

[0047] In an exemplary embodiment of this application, the torque of the force between the friction wheel and the mating surface acting on the swing arm is greater than the resistance torque of the initial swing of the swing arm. The resistance torque of the initial swing of the swing arm includes the torque of the second elastic element acting on the swing arm and the torque of the friction force between the swing arm and the fixed frame acting on the swing arm.

[0048] When the swing arm moves from the extended position to the retracted position or from the retracted position to the extended position, the force exerted on the swing arm by the second elastic element in the early stage of the swing arm movement is a resistance torque. The swing arm movement also needs to overcome the resistance torque, such as the torque exerted on the swing arm by the friction force between the swing arm and the fixed frame. The torque exerted on the swing arm by the force between the friction wheel and the mating surface is greater than the resistance torque of the swing arm rotation, so that the swing arm can move from the extended position to the retracted position or from the retracted position to the extended position, thereby improving the cleaning range of the cleaning component.

[0049] In an exemplary embodiment of this application, when the swing arm switches between the retracted position and the extended position, the motion path of the line of action of the force applied to the swing arm by the second elastic member passes through the axis of rotation between the swing arm and the fixed frame.

[0050] The second elastic element can be a spring, a rope, or other elastic element. After the line of action of the second elastic element applied to the swing arm passes through the axis of rotation between the swing arm and the fixed frame, the torque applied to the swing arm by the second elastic element will change in direction, thereby changing the torque applied to the swing arm by the second elastic element from the resistance torque of the swing arm rotation to the driving torque, effectively ensuring that when the friction wheel moves to the edge of the contact surface, the friction wheel can disengage from the contact surface.

[0051] In an exemplary embodiment of this application, the fixed frame is provided with a first limiting part; the swing arm is provided with a second limiting part; the first limiting part and the second limiting part cooperate to restrict the movement of the swing arm between the retracted position and the extended position.

[0052] By cooperating with the first and second limiting parts, the swing position of the swing arm is limited, preventing the swing arm and the fixed frame from rotating excessively under the action of the driving member or the second elastic member.

[0053] In an exemplary embodiment of this application, the second limiting part is a limiting groove, the first limiting part is a limiting block inserted into the limiting groove, and when the swing arm is in the retracted position and the extended position, the limiting block moves to the two ends of the limiting groove that are closed.

[0054] The matching between the limiting groove and the limiting block is stable and reliable, the implementation method is simple and low-cost, and the cost of cleaning equipment is reduced.

[0055] In an exemplary embodiment of this application, the swing arm and the fixed frame are rotatably connected via a first rotating shaft; the limiting block is an arc-shaped block, and the center of the arc-shaped block is on the axis of the first rotating shaft; there is a gap between the limiting block and the first rotating shaft; the limiting groove is an arc-shaped groove.

[0056] The arc-shaped limiting block increases the contact area between the limiting block and the arc-shaped limiting groove, thereby improving the stability of the limiting mechanism, reducing the probability of damage to the limiting block and the limiting groove, and extending their service life. The swing arm rotates around the first rotating axis, with the center of the arc-shaped block located on the axis of the first rotating axis. This ensures that the edge of the arc-shaped block abuts against the edge of the arc-shaped groove, reducing the pressure between them. A gap exists between the limiting block and the first rotating axis, preventing wear between the limiting block and the first rotating axis during rotation. Furthermore, the proximity of the limiting block to the first rotating axis improves the integration of the cleaning assembly and reduces its size.

[0057] A second aspect of this application provides a cleaning device, including a device body and a cleaning component as described above, wherein the mounting bracket of the cleaning component is mounted on the device body.

[0058] The cleaning equipment of this application includes a relatively rotatable fixed frame and a swing arm. A power component drives the fixed frame and swing arm to rotate relative to each other, thereby changing the cleaning range of the cleaning component. When cleaning ordinary surfaces, the swing arm is in the retracted position; when cleaning special areas such as corners, the cleaning component is in a special cleaning mode, and the swing arm is in the extended position, thus cleaning areas that cannot be covered by the cleaning component under normal circumstances, increasing the cleaning range, reducing blind spots, and improving cleaning effectiveness.

[0059] In combination with existing technologies, the beneficial effects of this application are as follows:

[0060] Existing cleaning equipment often fails to cover corner areas when cleaning indoor walls, resulting in large blind spots and incomplete cleaning. The cleaning component of this application includes a rotatable fixed frame and a swing arm. A power component drives the fixed frame and swing arm to rotate relative to each other, changing the cleaning range of the cleaning component. When cleaning ordinary surfaces, the swing arm is in a retracted position; when cleaning special areas such as corners, the swing arm is in an extended position, thus cleaning areas that cannot be covered by the conventional cleaning component, increasing the cleaning range, reducing blind spots, and improving cleaning effectiveness.

[0061] When the swing arm is in the retracted or extended position, the friction wheel continues to rotate. By preventing the swing arm from contacting the contact surface in the retracted and extended positions, friction between the swing arm and the contact surface is avoided, reducing wear on the friction wheel and the contact surface, extending their service life, and improving the durability of the cleaning equipment. Attached Figure Description

[0062] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0063] Figure 1 is a schematic diagram of an exemplary cleaning component of this application;

[0064] Figure 2 is a schematic diagram of an exemplary cleaning component of this application from another angle;

[0065] Figure 3 is a schematic diagram of a portion of the power component of an exemplary cleaning component of this application;

[0066] Figure 4 is a schematic diagram of an exemplary first transmission component and some driving components of this application;

[0067] Figure 5 is a cross-sectional schematic diagram of an exemplary friction wheel and external swing transmission assembly of this application;

[0068] Figure 6 is a schematic diagram of an exemplary wheel axle and part of the structure of this application;

[0069] Figure 7 is a perspective view of an exemplary fixing frame portion of this application;

[0070] Figure 8 is a partial structural diagram of an exemplary cleaning component of this application;

[0071] Figure 9 is a schematic diagram of an exemplary second transmission assembly and some driving components of this application;

[0072] Figure 10 is a schematic diagram of an exemplary second transmission component and part of the driving component of this application from another angle.

[0073] Figure 11 is a schematic diagram of an exemplary driver of this application;

[0074] Figure 12 is a schematic diagram of an exemplary swing arm of this application in the retracted position;

[0075] Figure 13 is a schematic diagram of an exemplary swing arm of this application when it moves from the retracted position to the extended position;

[0076] Figure 14 is a top view of an exemplary swing arm of this application when it is in a near fully extended position;

[0077] Figure 15 is a schematic diagram of the relative positions of the friction wheel and the fixed frame when an exemplary swing arm of this application is in a near fully extended position;

[0078] Figure 16 is a schematic diagram of the relative positions of the friction wheel and the fixed frame when an exemplary swing arm of this application is in the fully extended position;

[0079] Figure 17 is a schematic diagram of the relative positions of the friction wheel and the fixed frame when an exemplary swing arm of this application moves from the extended position to the retracted position;

[0080] Figure 18 is a top view of an exemplary swing arm of this application when it is in a near fully retracted position;

[0081] Figure 19 is a schematic diagram of the relative positions of the friction wheel and the fixed frame when an exemplary swing arm of this application is moved to a position close to the fully retracted position;

[0082] Figure 20 is a partial structural perspective view of an exemplary cleaning component of this application;

[0083] Figure 21 is a schematic diagram of an exemplary fixing frame structure of this application;

[0084] Figure 22 is a schematic diagram of a portion of an exemplary fixing frame structure from another angle according to this application;

[0085] Figure 23 is a three-dimensional schematic diagram of an exemplary swing arm structure of this application.

[0086] Component Numbering Explanation: 100, Fixing Frame; 110, First Rotating Shaft; 120, Mucking Surface; 121, First Mucking Surface; 122, Second Mucking Surface; 130, First Limiting Part; 140, Insertion Part; 150, Rotating Shaft Mounting Part; 160, First Mounting Member; 161, Insert Rod; 162, Insertion Part; 170, Top Housing; 180, Side Housing; 200, Swing Arm; 210, Second Limiting Part; 220, Elastic Member Mounting Part; 221, Limiting Protrusion; 230, Slot; 240, Upper Housing; 250, Lower Housing; 260, Second Mounting Member; 300, Power Component; 310, Drive Component; 311, Rotating Output Shaft; 312, Drive Output Gear; 313, Motor; 320, First Transmission Component; 3 21. Friction wheel; 3211. Retaining ring; 3212. Limiting ring; 322. Outward swing transmission assembly; 3221. Wheel axle; 3222. First stop part; 3223. Second stop part; 3224. First elastic element; 3225. Outward swing output gear; 3226. Cover plate; 323. First intermediate transmission assembly; 3231. First gear; 330. Second transmission assembly; 331. First rotary transmission assembly; 3311. Second gear; 3312. First rotary transmission gear; 332. Second rotary transmission assembly; 3321. Third gear; 3322. Fourth gear; 3323. Second rotary transmission gear; 3324. Fifth gear; 3325. Sixth gear; 400. Second elastic element. Detailed Implementation

[0087] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other. It should also be understood that the terminology used in the embodiments of this application is for describing specific implementation schemes and not for limiting the scope of protection of this application. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0088] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in this application, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this application, as well as the prior art known to those skilled in the art and the descriptions in this application, may be implemented using any prior art methods, devices, and materials similar to or equivalent to the methods, devices, and materials in the embodiments of this application.

[0089] It should be noted that the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of this application. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered as part of the scope of this application.

[0090] This application provides a cleaning device, which can be a mopping robot, a sweeping and mopping robot, or other cleaning robots that meet the requirements.

[0091] Cleaning equipment includes, but is not limited to, the main body of the equipment, a cleaning system, and a drive system. These systems coordinate with each other to enable the cleaning equipment to move autonomously and perform its cleaning function. The functional components constituting these systems are integrated within the main body of the equipment. It can be understood that cleaning equipment 1 can be a self-moving cleaning device, which is a device that can automatically perform cleaning operations in a designated area without user intervention. Of course, cleaning equipment can also be user-operated, such as a floor scrubber or a sweeper-mop combo.

[0092] The cleaning system of the cleaning equipment may include a dry cleaning system, which includes the aforementioned cleaning elements. The cleaning elements can interact with the surface to be cleaned to clean the surface. For example, the cleaning elements may include a roller brush module, and the cleaning system includes a dust box and a vacuum fan. The roller brush interacting with the ground brings dust, particles, and other debris on the ground to the suction port between the roller brush and the dust box, where it is then sucked into the dust box by the suction gas generated by the vacuum fan and passing through the dust box.

[0093] The cleaning system may include a side brush module, which is connected to the main body of the device and is used to move debris and other waste outside the roller brush area into the roller brush area of ​​the cleaning system. For example, the cleaning device may be a robotic vacuum cleaner.

[0094] The cleaning system may include a wet cleaning system, which includes the aforementioned cleaning elements. The cleaning elements are capable of interfering with the surface to be cleaned to achieve wet cleaning of the surface. For example, the cleaning device may be a mopping robot.

[0095] Existing cleaning equipment can clean wide and flat surfaces quite well, but when it comes to corners and other hard-to-reach areas, the equipment's size prevents it from reaching these areas, and its cleaning components are also unable to clean them effectively.

[0096] In view of this, this application provides a cleaning component and a cleaning device. The cleaning component can be a roller brush module, a side brush module, or other cleaning components of a cleaning system. The following detailed description uses a side brush module as an example of a cleaning component.

[0097] The swing arm 200 of the cleaning component has a retracted position and an extended position. When cleaning a wide and flat area, the cleaning component is in the normal cleaning mode, with the swing arm 200 in the retracted position, cleaning the surface to be cleaned. When encountering areas such as corners, the cleaning component switches to a special cleaning mode, with the swing arm 200 swinging to the extended position, adjusting the cleaning range of the cleaning component. The cleaning component can then reach into corner areas to clean corners or areas near corners, expanding the cleaning area of ​​the cleaning equipment, improving the comprehensiveness of the cleaning range, and enhancing the user experience.

[0098] Please refer to Figures 1 to 23. In a first aspect, this application provides a cleaning assembly, including a mounting bracket 100, a swing arm 200, and a power assembly 300.

[0099] The mounting bracket 100 is configured to connect to the main body of the cleaning equipment. A rotatable cleaning component is mounted on the swing arm 200, which is rotatably connected to the mounting bracket 100.

[0100] Referring to Figures 1 and 2, in one embodiment, a first rotating shaft 110 is provided on the fixed frame 100. The swing arm 200 is rotatably connected to the fixed frame 100 via the first rotating shaft 110. For example, one end of the first rotating shaft 110 is fixed to the fixed frame 100, and the other end passes through the swing arm 200, allowing the swing arm 200 to rotate relative to the first rotating shaft 110, thereby causing the swing arm 200 to rotate relative to the fixed frame 100. Alternatively, one end of the first rotating shaft 110 passes through the fixed frame 100, and the other end is fixed to the swing arm 200, allowing the first rotating shaft 110 to rotate relative to the fixed frame 100, thereby causing the swing arm 200 to rotate relative to the fixed frame 100; or, one end of the first rotating shaft 110 passes through the fixed frame 100, and the other end passes through the swing arm 200, allowing the first rotating shaft 110 to rotate relative to both the fixed frame 100 and the swing arm 200, thereby causing the swing arm 200 to rotate relative to the fixed frame 100.

[0101] Of course, as some alternatives, the first rotating shaft 110 can also rotate with the fixed frame 100 and / or the swing arm 200 in other ways so that the swing arm 200 is rotatable relative to the fixed frame 100.

[0102] The power unit 300 drives the cleaning component to rotate and can also drive the swing arm 200 to rotate relative to the fixed frame 100, so as to move the swing arm 200 between the retracted position and the extended position.

[0103] The cleaning component has a regular cleaning mode and a special cleaning mode. In the regular cleaning mode, the swing arm 200 is in the retracted position, and in the special cleaning mode, the swing arm 200 is in the extended position.

[0104] The cleaning component of this application includes a relatively rotatable fixed frame 100 and a swing arm 200. A power component 300 drives the fixed frame 100 and the swing arm 200 to rotate relative to each other, thereby changing the cleaning range of the cleaning component. When cleaning ordinary surfaces, the cleaning component is in a normal cleaning mode, and the swing arm 200 is in the retracted position. When cleaning special areas such as corners, the cleaning component is in a special cleaning mode, and the swing arm 200 is in the extended position. This allows for cleaning of areas that cannot be covered in the normal cleaning mode, increasing the cleaning range, reducing blind spots, improving cleaning effectiveness, and effectively enhancing user satisfaction.

[0105] Referring to Figure 3, in one embodiment, the power assembly 300 includes a drive member 310, a first transmission assembly 320, and a second transmission assembly 330. The first transmission assembly 320, driven by the drive member 310, drives the swing arm 200 to rotate relative to the fixed frame 100; the second transmission assembly 330, driven by the drive member 310, drives the cleaning component to rotate.

[0106] One drive unit 310 realizes two functions: the rotation of the swing arm 200 and the rotation of the cleaning component. This improves the utilization rate of the drive unit 310, reduces the number of drive units 310, and lowers costs. It also saves space for the cleaning components, facilitates the internal structure design of the cleaning components, and is conducive to the miniaturization and integration of the cleaning components and cleaning equipment, thereby helping to reduce cleaning blind spots.

[0107] Please refer to Figure 11. For example, the drive component 310 can be a motor 313, and the first transmission component 320 and the second transmission component 330 can be transmission components that transmit the output torque of the motor 313, such as gear transmission components, worm gear transmission components, belt transmission components, friction transmission components, etc., or combinations of the above transmission components.

[0108] Referring to Figure 11, in one embodiment, the drive unit 310 includes a rotation output shaft 311. The rotation output shaft 311 can be the output shaft of a motor 313, or a shaft connected to the output shaft of the motor 313. For example, the rotation output shaft 311 is connected to the output shaft of the motor 313 via a coupling. In the normal cleaning mode, the rotation output shaft 311 rotates in a first clockwise direction. In the special cleaning mode, the rotation output shaft 311 rotates in a second clockwise direction. One of the first clockwise direction and the second clockwise direction is clockwise, and the other is counterclockwise. When the rotation direction of the rotation output shaft 311 changes from the first clockwise direction to the second clockwise direction, the cleaning component switches from the normal cleaning mode to the special cleaning mode; when the rotation direction of the rotation output shaft 311 changes from the second clockwise direction to the first clockwise direction, the cleaning component switches from the special cleaning mode back to the normal cleaning mode. In other words, by changing the rotation direction of the output shaft 311, the swing arm 200 can move between the retracted and extended positions, thus switching between the regular cleaning mode and the special cleaning mode. When the drive unit 310 includes a motor 313, the forward and reverse rotation of the motor 313 is simple and controllable, and the operation is stable. Changing the rotation direction of the output shaft 311 changes the cleaning mode of the cleaning component, which is convenient to control and easy to implement.

[0109] In one embodiment, the cleaning component rotates in the same clockwise direction in both the special cleaning mode and the regular cleaning mode. The cleaning component can be a brush, which sweeps away dust, particles, hair, and other debris from the ground. If the cleaning component changes its rotation direction, the already cleaned dust and particles will re-contaminate the cleaned surface, and dust may be stirred up. The cleaning component of this application maintains a consistent clockwise rotation, which facilitates the removal of dust, particles, and other debris. The cleaning is consistent in both the regular and special cleaning modes, which helps the cleaning component remove dust, particles, and other debris and temporarily store them in the cleaning equipment, thus improving the cleanliness.

[0110] In some embodiments, the power component 300 is disposed on the swing arm 200. Since the transmission mechanism of the power component 300 may involve numerous gears and other components, resulting in a complex transmission connection, the power component 300 is entirely disposed on the swing arm 200. When the swing arm 200 and the fixed frame 100 rotate, the power component 300 moves along with the swing arm 200. This overall placement of the power component 300 on the swing arm 200 allows the transmission mechanism to swing together with the swing arm 200, reducing the probability of malfunctions in the transmission mechanism during the swing of the swing arm 200. The transmission mechanism of the power component 300 includes, but is not limited to, the first transmission component 320 and the second transmission component 330.

[0111] Of course, as some alternatives, the power unit 300 can also be set on the swing arm 200; it can also be partially set on the swing arm 200 and the other part set on the fixed frame 100, so that the power unit 300 can drive the swing arm 200 to rotate relative to the fixed frame 100.

[0112] In some embodiments, the first rotating shaft 110 is set independently of the power assembly 300. When using a single motor to realize the swing of the swing arm 200 and the rotation of the cleaning component, the transmission system involved in the first transmission assembly 320, the second transmission assembly 330, and other transmission mechanisms is relatively complex. Since the internal space of the swing arm 200 is very limited, the flexibility and compactness of the arrangement of the first transmission assembly 320 and the second transmission assembly 330 are crucial for space saving and transmission stability. In the embodiments of this specification, by setting the first rotating shaft 110 independently of the first transmission assembly 320, the second transmission assembly 330, and other components of the power assembly 300, the arrangement position of the first rotating shaft 110 can be avoided from affecting the arrangement of the first transmission assembly 320 and the second transmission assembly 330. This improves the flexibility and compactness of the arrangement of the first transmission assembly 320 and the second transmission assembly 330, thereby reducing the design difficulty of the transmission assembly while ensuring space utilization and transmission stability.

[0113] In some embodiments, the first rotating shaft 110 is located closer to the edge of the fixed frame 100 and the edge of the swing arm 200 to avoid occupying the central space of the swing arm, thereby further improving the flexibility and compactness of the arrangement of the transmission mechanism in the swing arm. At the same time, it can also reduce the interference and restriction of the main body of the fixed frame 100 or other components on the fixed frame 100 on the swing arm 200 when the swing arm 200 swings, ensuring the swing range of the swing arm 200, increasing the cleaning range, and improving the user experience.

[0114] Of course, in some implementations, a gear shaft or a rotation output shaft 311 in the power assembly 300 may be used as the first transmission shaft 110.

[0115] Referring to Figure 15, in one embodiment, the output end of the first transmission component 320 includes a friction wheel 321, and the wall of the fixed frame 100 is provided with a mating surface 120. When the friction wheel 321 abuts against the mating surface 120 and the friction wheel 321 rotates, there is a force between the friction wheel 321 and the mating surface 120, so that the friction wheel 321 rolls along the mating surface 120, thereby driving the swing arm 200 to rotate relative to the fixed frame 100 around the first rotation axis 110, realizing the switching of the swing arm 200 between the extended position and the retracted position.

[0116] Referring to Figure 15, in one embodiment, the force between the friction wheel 321 and the mating surface 120 can be frictional force. For example, the friction wheel 321 rubs against the surface of the mating surface 120, causing the friction wheel 321 to roll along the surface of the mating surface 120. The outer wall of the friction wheel 321 may include a roughened surface after roughening treatment. The surface of the mating surface 120 is also a roughened surface after roughening treatment. The frictional resistance between the roughened surfaces is greater, which is more conducive to the friction wheel 321 rolling along the surface of the mating surface 120. The outer wall of the friction wheel 321 may also be a corrugated surface, and the mating surface 120 may also be a corrugated surface, thereby increasing the frictional resistance between the friction wheel 321 and the mating surface 120, facilitating the rolling of the friction wheel 321 along the surface of the mating surface 120, and the swing arm 200 and the fixed frame 100 rotate relative to each other. The outer wall of the friction wheel 321 and the mating surface 120 may also be other surfaces treated to increase friction. The surface treatment methods of the outer wall of the friction wheel 321 and the mating surface 120 may be the same or different.

[0117] To increase the friction between the friction wheel 321 and the mating surface 120, the outer wall of the friction wheel 321 can be made of rubber to increase the pressure between the friction wheel 321 and the mating surface 120. Of course, the outer wall of the friction wheel 321 can also be made of other materials such as plastic or metal.

[0118] In another embodiment, the friction wheel 321 and the mating surface 120 may be under pressure. For example, the outer wall of the friction wheel 321 is provided with a plurality of first teeth, and the mating surface 120 is provided with a plurality of second teeth that mesh with the first teeth. The first teeth and the second teeth mesh to make the friction wheel 321 roll along the mating surface 120.

[0119] Of course, as some alternatives, other forces can be applied between the friction wheel 321 and the mating surface 120 so that the friction wheel 321 rolls along the surface of the mating surface 120 when it rotates.

[0120] During the cleaning process using the cleaning component, the swing arm 200 needs to swing for a very short time. Therefore, the friction wheel 321 briefly contacts the mating surface 120, which will not cause damage to the friction surface of the friction wheel 321 and the mating surface 120. However, if the working surface of the friction wheel 321 in contact with the mating surface 120 still contacts other components after the swing arm 200 has swung to its position, it will cause damage to the working surface of the friction wheel 321, affecting the function of the friction wheel 321 and the swing of the swing arm 200.

[0121] Referring to Figures 11 and 16, in some embodiments, when the swing arm 200 moves to the retracted or extended position, the friction wheel 321 does not abut against the contact surface 120. This avoids continued interaction between the friction wheel 321 and the contact surface 120, thereby improving the problem of wear on the working surface of the friction wheel 321 and the contact surface 120, which would affect the swing of the swing arm 200. Therefore, through the above solution, the service life of the friction wheel 321 and the contact surface 120 can be extended, ensuring the stability of the swing of the swing arm 200.

[0122] Referring to Figure 7, in one embodiment, the contact surface 120 protrudes from the wall of the mounting bracket 100. When the swing arm 200 is held in the retracted or extended position, the friction wheel 321 always rotates. Because the contact surface 120 protrudes from the wall of the mounting bracket 100, the friction wheel 321 does not come into contact with the wall when it moves to both sides of the contact surface 120. This avoids friction between the swing arm 200 and the wall of the mounting bracket 100 when it is held in the extended or retracted position, reduces wear on the friction wheel 321 and the wall of the mounting bracket 100, extends the service life of the friction wheel 321, and improves the durability of the cleaning equipment.

[0123] Of course, as some alternatives, the mating surface 120 is flush with part of the wall of the fixed frame 100, and the two ends of the mating surface 120 are respectively provided with recesses. The mating surface 120 protrudes relative to the wall of the recess. When the swing arm 200 is held in the retracted position or the extended position, the friction wheel 321 is located in the recess and does not contact the recess, thereby reducing the wear of the friction wheel 321.

[0124] Referring to Figure 7, in one embodiment, the mating surface 120 includes a first mating surface 121 and a second mating surface 122, which are arranged along the axial direction of the friction wheel 321. Taking the cleaning device being positioned on the surface to be cleaned, with the axial direction of the friction wheel 321 being vertical, as an example, the first mating surface 121 and the second mating surface 122 are arranged vertically. By moving the friction wheel 321 up and down, it abuts against the first mating surface 121 and the second mating surface 122 respectively. Thus, the position of the swing arm 200 is switched by rotating the friction wheel 321 in different clockwise directions.

[0125] Please refer to Figure 7. Projected along the axial direction of the friction wheel 321, one end of the projection of the first mating surface 121 extends beyond one end of the projection of the second mating surface 122, and the other end of the projection of the second mating surface 122 extends beyond the other end of the projection of the first mating surface 121. The first transmission assembly 320 includes an outward swing transmission assembly 322, which drives the friction wheel 321 to move along the axial direction of the friction wheel 321, so that the friction wheel 321 abuts against the first mating surface 121 and the second mating surface 122 respectively.

[0126] Please refer to Figure 7. The first end of the first mating surface 121 extends beyond the first end of the second mating surface 122, and the second end of the second mating surface 122 extends beyond the second end of the second mating surface 122. The first end and the second end are the two opposite ends of the mating surface 120. For example, the first end and the second end are the two ends of the mating surface 120 perpendicular to the axial direction of the friction wheel 321. When the swing arm 200 is held in the extended position or the retracted position, the friction wheel 321 is located beside the first end of the second mating surface 122 or beside the second end of the first mating surface 121. That is, the friction wheel 321 does not abut against the second mating surface 122 and the first mating surface 121, so as to avoid the friction wheel 321 from continuously acting with the first mating surface 121 and the second mating surface 111, resulting in wear of the friction wheel 321 and the mating surface 120.

[0127] For example, as shown in Figure 12, when the swing arm 200 is held in the retracted position, the friction wheel 321 is located above the second end of the second mating surface 122 and beside the second end of the first mating surface 121. The friction wheel 321 does not abut against either the first or second mating surface 121. When the swing arm 200 needs to be moved to the extended position, as shown in Figure 13, the friction wheel 321 is controlled to move downwards until it abuts against the second end of the second mating surface 122. The friction wheel 321 rotates, causing it to move along the surface of the second mating surface 122 until it moves to the first end of the second mating surface 122 and then disengages from it, as shown in Figure 15. At this time, the swing arm 200 is in the extended position. Similarly, when the swing arm 200 needs to move from the extended position to the retracted position, as shown in Figure 16, the friction wheel 321 moves upward to abut against the first mating surface 121, and then the friction wheel 321 rolls along the surface of the first mating surface 121, causing the swing arm 200 to rotate relative to the fixed frame 100 until the friction wheel 321 is above the second end of the second mating surface 122 and beside the second end of the first mating surface 121, and the swing arm 200 moves to the retracted position.

[0128] When the swing arm 200 is in the retracted position, the friction wheel 321 does not abut against the first mating surface 121, and after the friction wheel 321 moves along the axial direction of the friction wheel 321, it can abut against the second mating surface 122; when the swing arm 200 is in the extended position, the friction wheel 321 does not abut against the second mating surface 122, and after the friction wheel 321 moves along the axial direction of the friction wheel 321, it can abut against the first mating surface 121.

[0129] It should be noted that the first end and the second end mentioned above are illustrative examples and do not specifically refer to one end of the mating surface 120. For example, the first end can be the left end or the right end of the mating surface 120, and the second end is positioned opposite to the first end. Similarly, the positions of the first mating surface 121 and the second mating surface 122 along the axial direction of the friction wheel 321 are also illustrative examples. For example, when the axial direction of the friction wheel 321 is vertical, the first mating surface 121 can be located above the second mating surface 122, or it can be located below the second mating surface 122.

[0130] Please refer to Figures 4 to 6. In one embodiment, the external swing transmission assembly 322 includes a wheel axle 3221. One of the wheel axle 3221 and the friction wheel 321 is provided with a tooth groove that is helical along the axial direction of the wheel axle 3221, and the other is provided with a tooth that mates with the tooth groove. The tooth can slide in the tooth groove so that the friction wheel 321 can move along the axial direction of the wheel axle 3221.

[0131] In some embodiments, the friction wheel 321 is provided with a toothed groove through the inner wall of the wheel shaft 3221, and the outer periphery of the wheel shaft 3221 is provided with teeth. The engagement of the teeth and the toothed groove allows the friction wheel 321 to move along the axial direction of the wheel shaft 3221 when the teeth slide in the toothed groove.

[0132] Referring to Figures 5 and 6, in some embodiments, a toothed groove is provided on the outer periphery of the axle 3221, and teeth are provided on the inner wall of the friction wheel 321 penetrating the axle 3221. The friction wheel 321 moves axially along the axle 3221 as the teeth slide within the groove. The length of the toothed groove along the axle 3221 is the same as or positively correlated with the stroke of the friction wheel 321 along the axle 3221. Since the toothed groove is located on the axle 3221, the axial height of the friction wheel 321 can be selected to be smaller, thereby reducing the space occupied by the friction wheel 321 and the axle 3221, effectively reducing the volume of the cleaning assembly, and facilitating the internal space layout of the cleaning assembly.

[0133] The external swing transmission assembly 322 includes a first stop 3222 and a second stop 3223, which limit the stroke of the friction wheel 321 along the axial direction of the wheel axle 3221. Because the friction wheel 321 needs to generate a force with the contact surface 120 during the swing of the swing arm, this force tends to hinder the friction wheel 321 from rotating with the wheel axle 3221. By setting the first stop 3222 and the second stop 3223, the friction wheel 321 is limited. When the friction wheel 321 moves to the first stop 3222 or the second stop 3223, the wheel axle 3221 drives the friction wheel 321 to rotate. Meanwhile, the rigid stop can prevent the force between the friction wheel 321 and the mating surface 120 from causing a speed difference between the friction wheel 321 and the wheel axle 3221, which would lead to the friction wheel 321 moving up and down along the wheel axle 3221. Therefore, in this embodiment of the specification, by setting the first stop part 3222 and the second stop part 3223, the wheel axle 3221 drives the friction wheel 321 to rotate, which can further ensure the stability of the swing arm 200 swing.

[0134] The first stop 3222 can be disposed within the tooth groove, or outside the tooth groove, or partially disposed within the tooth groove and partially disposed outside the tooth groove; the second stop can be disposed within the tooth groove, or outside the tooth groove, or partially disposed within the tooth groove and partially disposed outside the tooth groove; the first stop 3222 and the second stop 3223 can limit the movement path of the friction wheel 321 on the axle 3221 by limiting the path of the tooth along the tooth groove, or they can directly limit the movement path of the friction wheel 321 on the axle 3221 by the position of the friction wheel 321 on the axle 3221.

[0135] Please refer to Figures 5 and 6. In one embodiment, the tooth groove is provided with a first stop 3222 and a second stop 3223; the first stop 3222 is provided at one end of the tooth groove; the second stop 3223 is provided at the other end of the tooth groove, so as to limit the travel of the friction wheel 321 along the axial direction of the wheel shaft 3221 by limiting the travel of the teeth in the tooth groove.

[0136] For example, the outer circumference of the axle 3221 is provided with a toothed groove; a first stop 3222 is provided at one end of the toothed groove; a second stop 3223 is provided at the other end of the toothed groove; wherein, the friction wheel 321 is provided with teeth that mate with the toothed groove, and the first stop 3222 and the second stop 3223 restrict the travel of the teeth of the friction wheel 321 along the toothed groove, thereby limiting the axial travel of the friction wheel 321 along the axle 3221. Through the engagement of the teeth and the toothed groove, the friction wheel 321 rotates relative to the axle 3221, thereby causing the friction wheel 321 to move axially along the axle 3221, adjusting the relative position of the friction wheel 321 with the first mating surface 121 and the second mating surface 122, so that the friction wheel 321 moves between the first mating surface 121 and the second mating surface 122. For example, when the tooth moves to the end of the tooth groove and is restricted by the first stop 3222 or the second stop 3223, the wheel shaft 3221 rotates and drives the friction wheel 321 to rotate synchronously, so that the friction wheel 321 generates a force between the first mating surface 121 or the second mating surface 122. The friction wheel 321 rolls along the first mating surface 121 or the second mating surface 122, driving the swing arm 200 to move relative to the fixed frame 100 until the swing arm 200 completes the switching between the retracted position and the extended position.

[0137] In some embodiments, the teeth on the friction wheel 321 can be protrusions extending from the inner wall of the friction wheel 321 toward the axis of the friction wheel 321. The friction wheel 321 moves along the axial direction of the wheel shaft 3221 by inserting the protrusions into the tooth grooves and moving relative to the tooth grooves. In other embodiments, the teeth on the friction wheel 321 can also be internal threads provided on the inner wall that mate with the tooth grooves. The friction wheel 321 moves along the axial direction of the wheel shaft 3221 by moving relative to the tooth grooves through the internal threads.

[0138] Of course, as some feasible methods, the friction wheel 321 can also be in the form of other teeth that mate with the tooth groove, so that the friction wheel 321 can move axially along the wheel shaft 3221 through the tooth-tooth-groove engagement.

[0139] For example, the axle 3221 is rotatably mounted on the swing arm 200. The axle 3221 can be directly rotatably connected to the swing arm 200, or it can be rotatably connected to the swing arm 200 through a bearing, so as to reduce the wear between the axle 3221 and the swing arm 200.

[0140] Please refer to Figure 5. In one embodiment, a cover plate 3226 is fixed to the end of the axle 3221. The outer diameter of the cover plate 3226 is larger than the outer diameter of the axle 3221. The cover plate 3226 further limits the friction wheel 321, preventing the friction wheel 321 from disengaging from the axle 3221 when the axle 3221 and the friction wheel 321 rotate relative to each other.

[0141] Referring to Figure 6, a toothed groove is provided on the outer periphery of the axle 3221, and the first stop portion 3222 is provided on the cover plate 3226 and extends towards the axle 3221 to block one end of the toothed groove. Compared to providing the first stop portion 3222 inside the toothed groove of the axle 3221, providing the first stop portion 3222 on the cover plate 3226 is easier to process and reduces manufacturing costs. At the same time, if the first stop portion 3222 is provided inside the toothed groove 3221, the friction wheel 321 cannot be screwed into the axle 3221, thus making it impossible to complete the assembly of the friction wheel 321 and the axle 3221. By providing the first stop portion 3222 on the cover plate 3226, it is beneficial to assemble the friction wheel 321 and the axle 3221.

[0142] The methods of fixing the cover plate 3226 and the axle 3221 include, but are not limited to, welding connection, bolt connection, and adhesive connection. Bolting connection is preferred, that is, the bolt passes through the cover plate 3226 and is threadedly connected to the axle 3221, so that the cover plate 3226 and the axle 3221 are fixed together.

[0143] Referring to Figures 4 and 5, in one embodiment, the external swing transmission assembly 322 includes a first elastic element 3224. The first elastic element 3224 applies a force that reduces the pressure between the friction wheel 321 and the axle 3221, for example, reducing the pressure between the contact surfaces of the teeth and grooves, thereby reducing the frictional force between the friction wheel 321 and the axle 3221, for example, reducing the frictional force between the contact surfaces of the mating teeth and grooves. As shown in the above embodiment, the friction wheel 321 moves along the axial direction of the axle 3221 through the engagement of the teeth and grooves. However, the friction wheel 321 itself has a certain weight, and under the action of gravity, there is a certain pressure between the contact surfaces of the teeth and grooves of the friction wheel 321 and the axle 3221, resulting in frictional force between the corresponding contact surfaces of the friction wheel 321 and the axle 3221. When the axle 3221 rotates, the friction wheel 321 tends to rotate with the axle 3221 under the action of friction, which affects the relative rotation between the friction wheel 321 and the axle 3221. The first elastic element 3224 can reduce the pressure between the corresponding contact surfaces of the friction wheel 321 and the axle 3221, thereby reducing the friction between the corresponding contact surfaces and allowing the friction wheel 321 to rotate relative to the axle 3221. For example, the teeth of the friction wheel 321 slide along the tooth grooves of the axle 3221, enabling the friction wheel 321 to move axially relative to the axle 3221, completing the switching between the first contact surface 121 and the second contact surface 122.

[0144] Therefore, in the embodiments of this specification, by setting the first elastic element 3224 to offset the pressure between the contact surfaces of the tooth and the tooth groove, the friction between the contact surfaces of the tooth and the tooth groove is reduced, allowing the tooth to slide in the tooth groove. When the tooth slides to the first stop 3222 or the second stop 3223, the first stop 3222 or the second stop 3223 is used to prevent the tooth from sliding in the tooth groove, so that the wheel axle 3221 drives the friction wheel 321 to rotate. During the cleaning process using the cleaning component, the swing arm 200 needs to swing for a very short time. Therefore, the friction wheel 321 briefly contacts the mating surface 120, which will not damage the working surface of the friction wheel 321 or the mating surface 120. However, if the working surface of the friction wheel 321 still contacts other components after the swing arm 200 has swung to its position, it will obviously damage the working surface of the friction wheel 321 and affect the swing of the swing arm 200. In this embodiment of the specification, the first elastic element 3224 is provided to offset the pressure between the contact surfaces of the teeth and the tooth groove. Compared with the method of providing a damping element on the side wall of the friction wheel 321 to change the rotation speed of the friction wheel 321, thereby avoiding the friction wheel 321 and the wheel axle 3221 from rotating together and realizing the axial movement of the friction wheel 321 relative to the wheel axle 3221, the method of the swing arm 200 in swing position can avoid the working surface of the friction wheel 321 from contacting other components, thus reducing the damage to the working surface of the friction wheel 321.

[0145] The inner wall of the friction wheel 321 can be directly provided with protrusions or internal threads to form teeth that mate with the tooth groove. When the contact surface between the friction wheel 321 and the mating surface 120 is made of materials such as rubber or plastic, it is inconvenient to directly provide teeth on the inner wall of the friction wheel 321, or the durability of the teeth is limited. The friction wheel 321 may include a main body of the friction wheel 321 and a metal part provided on the inner wall of the main body of the friction wheel 321. The metal part is fixed relative to the main body of the friction wheel 321, which not only improves the durability of the teeth and ensures the stability of the movement of the friction wheel 321, but also effectively ensures that there is a suitable force between the friction wheel 321 and the mating surface 120. For example, the metal part can be a metal nut with internal threads that mate with the tooth groove, which facilitates material selection and processing and reduces costs.

[0146] The first elastic element, 3224, is preferably a spring. The spring force is stable and controllable, the cost is low, and it is easy to arrange.

[0147] Referring to Figures 12 and 20, the swing arm 200 is provided with an elastic element mounting portion 220, and the end of the first elastic element 3224 away from the friction wheel 321 presses against the elastic element mounting portion 220. The elastic element mounting portion 220 is provided on the swing arm 200. During the swinging process of the swing arm 200, the first elastic element 3224 swings along with the swing arm 200, which can prevent the swing arm 200 from causing additional deformation of the first elastic element 3224, thereby affecting the stability of the first elastic element 3224.

[0148] The elastic element mounting portion 220 can be located below the friction wheel 321. For example, the elastic element mounting portion 220 can be located on the bottom wall of the housing of the swing arm 200. Alternatively, when the friction wheel 321 is located outside the housing of the swing arm 200, the elastic element mounting portion 220 can be located on the upper housing 240 of the swing arm 200. The first elastic element 3224 is a compression spring, which applies a spring force to the friction wheel 321 in the opposite direction to the gravity of the friction wheel 321. Of course, the elastic element mounting portion 220 can also be located above the friction wheel 321. For example, when the friction wheel 321 is located inside the housing of the swing arm 200, the elastic element mounting portion 220 can be located on the upper housing 240 of the swing arm 200. The first elastic element 3224 is a tension spring, which applies a spring force to the friction wheel 321 in the opposite direction to the gravity of the friction wheel 321.

[0149] In some embodiments, the elastic element mounting portion 220 is provided with a limiting protrusion 221 facing the friction wheel 321 on the side facing the friction wheel 321. The first elastic element 3224 is sleeved on the limiting protrusion 221 to further limit the first elastic element 3224, reduce the shaking of the first elastic element 3224, and improve the problem that the first elastic element 3224 shakes to the wheel axle 3221 and interferes with the movement of the friction wheel 321.

[0150] In some embodiments, the first elastic element 3224 can be sleeved on the outside of the axle 3221 to further reduce the space occupied. At the same time, the axle 3221 can also be used to stabilize the first elastic element 3224.

[0151] Preferably, when the cleaning device is placed on the surface to be cleaned, the axle 3221 is vertically arranged, and the axial direction of the friction wheel 321 is vertical. The gravity acting on the friction wheel 321 is completely opposite to the elastic force of the first elastic element 3224, making it easier to counteract the force between the friction wheel 321 and the axle 3221.

[0152] Referring to Figures 5 and 12, in one embodiment, a retaining ring 3211 is provided on the side of the friction wheel 321 near the first elastic member 3224, and the retaining ring 3211 rotates relative to the friction wheel 321. One end of the first elastic member 3224 presses against the elastic member mounting portion 220 of the retaining ring 3211. The first elastic member 3224 and the retaining ring 3211 may simply contact and press against each other, or they may be fixed together and pressed against each other. The fixing methods include, but are not limited to, welding and gluing. When the friction wheel 321 rotates relative to the axle 3221, the retaining ring 3211 rotates relative to the friction wheel 321, thereby reducing the torsion of the first elastic member 3224, reducing the probability of torsional damage to the first elastic member 3224, extending the service life of the first elastic member 3224, and improving the durability of the first elastic member 3224.

[0153] In some embodiments, when the friction wheel 321 rotates relative to the axle 3221, the torque exerted by the frictional force between the retaining ring 3211 and the friction wheel 321 on the retaining ring 3211 is not greater than the torque required to twist the first elastic element 3224 to a threshold angle. The relatively small frictional force between the retaining ring 3211 and the friction wheel 321 results in a smaller force exerted by the retaining ring 3211 on the first elastic element 3224. This reduces the twisting of the first elastic element 3224, preventing the twisting angle from exceeding the threshold angle, thus lowering the probability of damage to the first elastic element 3224 and effectively improving its service life.

[0154] In one embodiment, the area where the retaining ring 3211 abuts against the friction wheel 321 is a smooth surface. The smooth surface significantly reduces the friction between the friction wheel 321 and the retaining ring 3211. While reducing the torsion of the first elastic element 3224, it also prevents the friction between the retaining ring 3211 and the friction wheel 321 from hindering the rotation of the friction wheel 321, thus avoiding the need for a large driving force from the axle 3221 to rotate the friction wheel 321. Simultaneously, the lower friction between the retaining ring 3211 and the friction wheel 321 also reduces wear on the contact surfaces of the retaining ring 3211 and the friction wheel 321 during rotation.

[0155] In some embodiments, when the friction wheel 321 includes a body and a metal component, the retaining ring 3211 contacts the metal component. By contacting the retaining ring 3211 with the metal component, wear on the body of the friction wheel 321 caused by the relative rotation of the retaining ring 3211 and the body of the friction wheel 321 can be reduced, further preventing damage to the shape of the friction wheel 321 caused by the retaining ring 3211. Simultaneously, the coefficient of friction between the body of the friction wheel 321 and the retaining ring 3211 is generally greater than the coefficient of friction between the metal component and the retaining ring 3211, and the contact between the retaining ring 3211 and the metal component facilitates relative rotation between the friction wheel 321 and the retaining ring 3211.

[0156] In some embodiments, the retaining ring 3211 can be fitted onto the axle 3221 to further reduce the space occupied.

[0157] In some embodiments, a limiting ring 3212 may be provided on the side of the retaining ring 3211 near the first elastic member 3224. The first elastic member 3224 is sleeved on the limiting ring 3212 and presses against the retaining ring 3211. The first elastic member 3224 is sleeved on the limiting ring 3212, which positions the first elastic member 3224, reduces the shaking of the first elastic member 3224, and prevents the first elastic member 3224 from abutting against the wheel axle 3221, thereby interfering with the movement of the friction wheel 321 or damaging the first elastic member 3224.

[0158] Referring to Figures 3 and 4, in one embodiment, the first transmission assembly 320 includes a first intermediate transmission assembly 323. The input end of the first intermediate transmission assembly 323 is connected to the drive member 310, and the output end of the first intermediate transmission assembly 323 is connected to the wheel axle 3221. The first transmission assembly 320 causes the drive member 310 to drive the wheel axle 3221 to rotate. The first transmission assembly 320 connects the drive member 310 and the wheel axle 3221, causing the drive member 310 to drive the wheel axle 3221 to rotate, thereby causing the friction wheel 321 to move and causing the swing arm 200 to swing, completing the switching of the position of the swing arm 200 and the change of the cleaning mode.

[0159] Referring to Figure 10, in one embodiment, the driving component 310 includes a rotating output shaft 311 and a driving output gear 312, with the driving output gear 312 fixed to the rotating output shaft 311; an outward-swinging output gear 3225 is disposed on the wheel axle 3221; the first intermediate transmission assembly 323 includes a plurality of first gears 3231 arranged sequentially along the transmission direction, with adjacent first gears 3231 meshing with each other and / or adjacent first gears 3231 being fixed together; wherein, the first gear 3231 at the input end of the first intermediate transmission assembly 323 meshes with the driving output gear 312; the first gear 3231 at the output end of the first transmission assembly 320 meshes with the outward-swinging output gear 3225. The first transmission assembly 320 completes transmission by directly meshing adjacent first gears 3231 or by fixing adjacent first gears 3231 coaxially, transmitting the torque output by the rotating output shaft 311 via the driving output gear 312 to the wheel axle 3221, thereby driving the friction wheel 321 to move axially and rotate circumferentially.

[0160] Referring to Figures 14 and 18, in one embodiment, the cleaning assembly includes a second elastic member 400. One end of the second elastic member 400 is disposed on the swing arm 200, and the other end of the second elastic member 400 is disposed on the fixing frame 100. When the swing arm 200 is in the retracted position, the second elastic member 400 applies a force to the swing arm 200 with a rotational tendency in a third clockwise direction, causing the friction wheel 321 to disengage from the mating surface 120. The third clockwise direction is the rotational direction of the swing arm 200 from the extended position to the retracted position. When the swing arm 200 is in the extended position, the second elastic member 400 applies a force to the swing arm 200 with a rotational tendency in a fourth clockwise direction, causing the friction wheel 321 to disengage from the mating surface 120. The fourth clockwise direction is the rotational direction of the swing arm 200 from the retracted position to the extended position.

[0161] When the cleaning component moves from the retracted position to the extended position, the force between the friction wheel 321 and the second mating surface 122 causes the friction wheel 321 to roll along the second mating surface 122, as shown in Figure 15. When the friction wheel 321 moves to the end of the second mating surface 122, it partially contacts the second mating surface 122. The force between the friction wheel 321 and the second mating surface 122 is insufficient to completely disengage the friction wheel 321 from the second mating surface 122. A certain force is always present between the end of the friction wheel 321 and the end of the second mating surface 122, which can lead to problems such as vibration of the swing arm 200, wear of the friction wheel 321, and wear of the second mating surface 122. The force applied to the swing arm 200 by the second elastic element 400 allows the friction wheel 321 to completely disengage from the second mating surface 122, thereby reducing the vibration of the swing arm 200, avoiding wear of the friction wheel 321 and the second mating surface 122, and extending the service life of the friction wheel 321 and the second mating surface 122. Meanwhile, the second elastic element 400 applies a continuous force to the swing arm 200, which can also reduce the swaying of the swing arm 200 during the cleaning process and prevent the swing arm 200 from retracting. During the cleaning process, if the cleaning component is squeezed or bumped against the wall or other surfaces, the swing arm 200 may rotate towards the retracted position. Under the action of the second elastic element 400, the cleaning component will promptly return to the extended position.

[0162] Similarly, as shown in Figure 19, when the cleaning component moves from the extended position to the retracted position, the friction wheel 321 contacts the edge of the first contact surface 121. The friction wheel 321 cannot completely disengage from the first contact surface 121. The second elastic element 400 applies a force to the swing arm 200 in a third clockwise direction, causing the swing arm 200 to move towards the retracted position. The friction wheel 321 completely disengages from the first contact surface 121, reducing the swaying of the swing arm 200, reducing the wear between the friction wheel 321 and the first contact surface 121, and improving the service life.

[0163] In some embodiments, if the swing arm 200 is pressed against a wall or similar surface in its extended position, causing excessive rotation of the swing arm 200 towards the retracted position, an anomaly detection can be used to control the motor to reverse. This causes the friction wheel 321 to move axially along the axle 3221, switching the contact surface 120. The friction wheel 321 then moves along the switched contact surface 120, allowing the swing arm 200 to move to the retracted position, thus preventing damage to the cleaning component or other parts of the cleaning assembly. If the swing arm 200 is pressed against a wall or similar surface, causing excessive rotation of the swing arm 200 towards the retracted position, the motor may stall. This anomaly can be determined by detecting the current in the motor frame. Of course, other methods can also be used for anomaly detection, and this application does not limit this approach.

[0164] Referring to Figures 14 and 18, in one embodiment, when the swing arm 200 switches between the retracted position and the extended position, the path of the force exerted by the second elastic element 400 on the swing arm 200 passes through the axis of rotation between the swing arm 200 and the fixed frame 100. For example, the second elastic element 400 is a spring or a pull rope, etc. During the switching process, the second elastic element 400 will intersect the axis of the first rotation axis 110 once, thereby changing the direction of the torque exerted by the second elastic element 400 on the swing arm 200. When the swing arm 200 is in the retracted position, the direction of the torque exerted by the second elastic element 400 on the swing arm 200 is along the direction of the swing arm 200 from the extended position to the retracted position. In other words, the force exerted by the second elastic element 400 on the swing arm 200 causes the swing arm 200 to have a tendency to rotate from the extended position to the retracted position. When the swing arm 200 is in the extended position, the direction of the torque exerted by the second elastic element 400 on the swing arm 200 is along the direction of the swing arm 200 from the retracted position to the extended position. In other words, the force exerted by the second elastic element 400 on the swing arm 200 causes the swing arm 200 to have a tendency to rotate from the retracted position to the extended position.

[0165] When the axis of the second elastic element 400 intersects the axis of the first rotation shaft 110, the perpendicular distance between the line of action of the elastic force of the second elastic element 400 and the rotation axis of the swing arm 200 (i.e., the axis of the first rotation shaft 110) is zero, that is, the lever arm is zero. At this time, the torque exerted by the second elastic element 400 on the swing arm 200 rotating around the axis of the first rotation shaft 110 is zero. When the swing arm 200 continues to swing from this position to the extended position or the retracted position, the axis of the second elastic element 400 shifts to the side of the axis of the first rotation shaft 110, and the perpendicular distance between the line of action of the elastic force of the second elastic element 400 and the rotation axis of the swing arm 200 gradually increases, that is, the lever arm gradually increases. The torque exerted by the second elastic element 400 on the swing arm 200 causes the swing arm 200 to rotate around the axis of the first rotation shaft 110. As can be seen from the above embodiments, when the swing arm 200 swings from the extended position to the retracted position, or from the retracted position to the extended position, the contact area between the friction wheel 321 and the mating surface 120 decreases, resulting in a decrease in the force between the friction wheel 321 and the mating surface 120. Consequently, the torque corresponding to this force cannot overcome the resistance to the rotation of the swing arm 200, and the swing arm 200 cannot continue to rotate. In this embodiment, by further providing a second elastic element 400, the torque corresponding to the elastic force of the second elastic element 400 is used to compensate for the torque required for the swing arm 200 to continue rotating, so that the swing arm 200 can continue to rotate, thereby allowing the friction wheel 321 to rotate to a position where it disengages from the mating surface 120.

[0166] Furthermore, through this embodiment, when the swing arm 200 is in the extended position and the retracted position, the second elastic element 400 compensates for the different directions of the torque on the swing arm 200. Thus, by setting an elastic element, the swing arm 200 can be provided with the required torque compensation when it is in different positions, which helps to move the friction wheel 321 into place. The structure is simple and compact, and the space required for the swing of the cleaning component is small. Especially for cleaning components with small space, this structural design makes the structure of the cleaning component more compact.

[0167] When the friction wheel 321 rolls along the mating surface 120 to the edge of the mating surface 120, the torque of the second elastic element 400 acting on the swing arm 200 is greater than or equal to the resistance torque of the swing arm 200 moving in the direction of the friction wheel 321 away from the mating surface 120. When the torque exerted by the second elastic element 400 on the swing arm 200 is greater than the resistance torque of the swing arm 200 moving in the direction of the friction wheel 321 disengaging from the mating surface 120, the second elastic element 400 can cause the swing arm 200 to disengage from the mating surface 120. When the torque exerted by the second elastic element 400 on the swing arm 200 is equal to the resistance torque of the swing arm 200 moving in the direction of the friction wheel 321 disengaging from the mating surface 120, the swing arm 200 will continue to move under inertia, thereby causing the friction wheel 321 to disengage from the mating surface 120. This effectively ensures that the friction wheel 321 can disengage from the mating surface 120 in both the extended and retracted positions, reducing wear between the friction wheel 321 and the mating surface 120. The resistance torque of the swing arm 200 moving in the direction of the friction wheel 321 disengaging from the mating surface 120 includes the torque exerted by the frictional force between the swing arm 200 and the fixed frame 100 on the swing arm 200.

[0168] The torque exerted by the friction wheel 321 and the mating surface 120 on the swing arm 200 is greater than the resistance torque of the initial swing of the swing arm 200. The resistance torque of the initial swing of the swing arm 200 includes the torque exerted by the second elastic element 400 on the swing arm 200 and the torque exerted by the friction force between the swing arm 200 and the fixed frame 100 on the swing arm 200. When the swing arm 200 moves from the extended position to the retracted position or from the retracted position to the extended position, the force exerted by the second elastic element 400 on the swing arm 200 at the beginning of the movement is a resistance torque. The movement of the swing arm 200 also needs to overcome the resistance torque, such as the torque exerted by the friction between the swing arm 200 and the fixed frame 100. The torque exerted on the swing arm 200 by the force between the friction wheel 321 and the mating surface 120 is greater than the resistance torque of the swing arm 200 rotation, so that the swing arm 200 can move from the extended position to the retracted position or from the retracted position to the extended position, thereby increasing the cleaning range of the cleaning component.

[0169] For example, before the swing arm 200 swings from the retracted position to the extended position, and before the axis of the second elastic member 400 intersects the axis of the first rotation shaft 110, the torque generated by the force of the friction wheel 321 and the second mating surface 122 on the swing arm 200 is greater than the sum of the torque of the second elastic member 400 acting on the swing arm 200 and the torque generated by the initial resistance of the swing arm 200, so that the swing arm 200 can swing; similarly, before the swing arm 200 swings from the extended position to the retracted position, and before the axis of the second elastic member 400 intersects the axis of the first rotation shaft 110, the torque generated by the force of the friction wheel 321 and the first mating surface 121 on the swing arm 200 is greater than the sum of the torque of the second elastic member 400 acting on the swing arm 200 and the torque generated by the initial resistance of the swing arm 200, so that the swing arm 200 can swing from the extended position to the retracted position. Wherein, the torque generated by the initial resistance is the torque that the swing arm 200 needs to overcome when neither the torque generated by the second elastic element 400 nor the torque generated by the friction wheel exists, that is, the torque of the friction force between the swing arm 200 and the fixed frame 100 acting on the swing arm 200, and the resistance torque.

[0170] In some embodiments, the second elastic element is a spring with lugs at both ends, which are respectively fitted onto the mounting rods of the swing arm 200 and the fixing frame 100. Furthermore, the mounting rod has a limiting structure to prevent the spring from detaching from the swing arm 200 or the fixing frame 100.

[0171] Referring to Figures 7 and 8, in one embodiment, the fixing frame 100 is provided with a first limiting part 130, and the swing arm 200 is provided with a second limiting part 210. The first limiting part 130 and the second limiting part 210 cooperate to limit the travel of the swing arm 200 between the retracted position and the extended position. Through the cooperation of the first limiting part 130 and the second limiting part 210, the swing position of the swing arm 200 is limited, preventing the swing arm 200 from excessively rotating under the action of the second elastic member 400.

[0172] Referring to Figure 8, in one embodiment, the second limiting part 210 is a limiting groove, and the first limiting part 130 is a limiting block inserted into the limiting groove. When the swing arm 200 is in the retracted position and the extended position, the limiting block moves to the two closed ends of the limiting groove, respectively. The cooperation between the limiting groove and the limiting block is stable and reliable, the implementation method is simple, the cost is low, and the cost of cleaning equipment is reduced.

[0173] In one embodiment, the limiting block is an arc-shaped block, and the center of the arc-shaped block is on the axis of the first rotating shaft 110. There is a gap between the limiting block and the first rotating shaft 110. In other words, the first rotating shaft 110 and the limiting block do not contact each other, and the distance between the first rotating shaft 110 and the limiting block is small. This avoids friction between the limiting block and the first rotating shaft 110, and also reduces the volume of the limiting block and the limiting groove, which is beneficial to the miniaturization and integration of the cleaning component.

[0174] The limiting groove is an arc-shaped groove. The arc-shaped limiting block can increase the contact area between the limiting block and the arc-shaped limiting groove, thereby improving the stability of the limiting, reducing the probability of damage to the limiting block and the limiting groove, and extending the service life. The swing arm 200 rotates around the first rotating shaft 110, and the center of the arc-shaped block is on the axis of the first rotating shaft 110, which can ensure that the edge of the arc-shaped block abuts against the edge of the arc-shaped groove, reducing the pressure between the arc-shaped block and the arc-shaped groove.

[0175] Referring to Figures 22 and 23, in some embodiments, the fixed frame 100 is provided with an insertion part 140, and the swing arm 200 is provided with a slot 230 adapted to the insertion part 140, the insertion part 140 being inserted into the slot 230; wherein, the first rotating shaft 110 is disposed at the insertion part 140, and the axis of the first rotating shaft 110 coincides with the axis of the insertion part 140. When the swing arm 200 and the fixed frame 100 sway relative to each other, a shear force is generated on the first rotating shaft 110. Due to the volume limitation of the cleaning assembly, the outer diameter of the first rotating shaft 110 is limited, and the shear force it can withstand is limited. By providing the insertion part 140 and the slot 230, the swaying of the swing arm 200 and the fixed frame 100 in a direction perpendicular to the axis of the first rotating shaft 110 is limited, effectively reducing the shear force on the first rotating shaft 110, reducing the risk of radial damage to the first rotating shaft 110, increasing the service life of the first rotating shaft 110, and improving the durability of the cleaning assembly and cleaning equipment.

[0176] In some embodiments, the insertion portion 140 has a circular cross-section along its radial direction, and the slot 230 is a circular groove. The circular insertion portion 140 and the circular slot 230 can rotate relative to each other, and the slot 230 can provide support for the insertion portion 140 in the radial direction, effectively protecting the first rotating shaft 110.

[0177] In other embodiments, the insertion portion 140 has a circular cross-section along its radial direction, and the slot 230 is an arc-shaped groove with an angle greater than 180°. The arc-shaped slot 230 with an angle greater than 180° limits and supports the insertion portion 140, preventing relative movement between the insertion portion 140 and the slot 230 along the radial direction of the insertion portion 140, thus ensuring support for the first rotating shaft 110. The angle of the slot 230 can be any angle between 180° and 360°, such as 180°, 200°, 270°, 300°, etc.

[0178] Please refer to Figure 23. Furthermore, the slot 230 is connected to the limiting groove, and the first limiting part 130 is inserted into the limiting groove. The connection between the slot 230 and the limiting groove can minimize the distance between the first limiting part 130 and the first rotating shaft 110, thereby reducing the volume of the limiting groove. This facilitates the design and layout of the space near the first rotating shaft 110 and improves the integration of the cleaning components.

[0179] Referring to Figure 22, in some embodiments, the mounting bracket 100 is provided with a rotating shaft mounting portion 150 and a first mounting member 160. The first rotating shaft 110 passes through the rotating shaft mounting portion 150, and the first mounting member 160 abuts against the rotating shaft mounting portion 150. One end of the second elastic member 400 is connected to the first mounting member 160. Due to the volume limitation of the cleaning assembly, the outer diameter of the first mounting member 160 used to mount the second elastic member 400 is limited, which can easily lead to damage at the connection between the first mounting member 160 and the mounting bracket 100 or to the body of the first mounting member 160. By having the rotating shaft mounting portion 150 abut against the first mounting member 160, the rotating shaft mounting portion 150 supports the first mounting member 160, improving the load-bearing capacity of the first mounting member 160, reducing the risk of damage at the connection between the first mounting member 160 and the mounting bracket 100 or to the body of the first mounting member 160, and improving the durability of the first mounting member 160.

[0180] Referring to Figure 22, in some embodiments, the first mounting member 160 includes a plug 161 and a connector 162. The plug 161 is inserted into the connector 162, and the connector 162 abuts against the rotating shaft mounting portion 150. The second elastic member is mounted on the plug 161. The insertion of the plug 161 into the connector 162 facilitates the installation of the plug 161 and the second elastic member 400, and facilitates the assembly of the cleaning components.

[0181] In some embodiments, the first mounting member 160 is disposed between the first rotating shaft 110 and the mating surface 120; one end of the second elastic member 400 is connected to the first mounting member 160; a second mounting member 260 is disposed on the swing arm 200, the second mounting member 260 is disposed between the first rotating shaft 110 and the connecting end of the cleaning member, and the other end of the second elastic member 400 is connected to the second mounting member 260. The two ends of the second elastic member 400 are respectively mounted on the first mounting member 160 and the second mounting member 260, effectively ensuring that the second elastic member 400 functions properly and that the friction wheel 321 can disengage from the mating surface 120 when it moves from the middle of the mating surface 120 to the edges of both ends of the mating surface 120.

[0182] Please refer to Figure 23. In some embodiments, the swing arm 200 includes a relatively fixed upper housing 240 and a lower housing 250. The upper housing 240 and the lower housing 250 form a receiving cavity, in which a portion of the transmission mechanism of the power assembly is installed, such as a first intermediate transmission assembly 323, a second transmission assembly 330, etc.

[0183] In some embodiments, the drive component 310 includes a motor 313, which is disposed on the upper side of the upper housing 240 of the swing arm 200. This allows for full utilization of the space in the upper housing 240 and facilitates the arrangement of the cleaning components. The connection ends of the friction wheel 321 and the cleaning component are located at opposite ends of the swing arm 200 along its length. The connection end of the cleaning component is where the swing arm 200 connects to the cleaning component. With the connection ends of the friction wheel 321 and the cleaning component located at opposite ends of the swing arm 200 along its length, when the swing arm 200 reaches the extended position, the cleaning component can move further away from the main body of the cleaning component, thereby increasing the cleaning range of the cleaning component.

[0184] The motor 313 is located between the friction wheel 321 and the connection end of the cleaning component. When the swing arm 200 is extended, the motor 313 is located on the lower side of the main body of the cleaning device. The motor 313 remains on the lower side of the main body of the cleaning device when the swing arm 200 is in both the extended and retracted positions, preventing the motor 313 from being exposed, avoiding damage from impacts, and improving the safety of the cleaning device during use.

[0185] In some embodiments, the first rotating shaft 110 is located between the friction wheel 321 and the connection end of the cleaning component. The first rotating shaft 110 and the motor 313 are arranged along the width direction of the swing arm 200. The width direction of the swing arm 200 is perpendicular to the length direction of the swing arm 200 and perpendicular to the height direction of the swing arm 200. The line connecting the axis of the first rotating shaft 110 and the axis of the output shaft of the motor 313 is parallel or substantially parallel to the width direction of the swing arm 200. By making full use of the width space of the swing arm 200, the first rotating shaft 110 can be located close to the edge of the swing arm 200 and / or the fixed frame 100, which makes it easier for the swing arm 200 to rotate relative to the fixed frame.

[0186] Referring to Figures 21 and 22, in some embodiments, the mounting bracket 100 includes a top housing 170 and a side housing 180. The top housing 170 is located above the upper housing 240 of the swing arm and has a clearance space near the motor 313 to prevent interference between the motor 313 and the mounting bracket 100. The friction wheel 321 is located below the top housing 170, which protects the friction wheel 321 and reduces the risk of it being bumped or knocked. The friction wheel 321 rotates during the use of the cleaning assembly. The protection of the friction wheel 321 by the top housing 170 reduces the risk of debris entering the friction wheel 321 and minimizes the possibility of debris restricting its movement. The side housing 180 is located on one side of the top housing 170 and extends toward the swing arm 200. The mating surface 120 is provided on the wall surface of the side housing 180 facing the friction wheel 321. The side housing 180 can protect the friction wheel 321 on one hand, and on the other hand, the mating surface 120 on the side housing 180 abuts against the friction wheel 321, causing the friction wheel 321 to roll along the mating surface 120, thereby driving the swing arm 200 to rotate relative to the fixed frame 100.

[0187] Referring to Figures 22 and 23, in some embodiments, the fixing frame 100 is provided with a first limiting part 130, which is located on the side of the first rotating shaft 110 near the friction wheel 321; the swing arm 200 is provided with a second limiting part 210, which is located on the side of the first rotating shaft 110 away from the cleaning component; the first limiting part 130 and the second limiting part 210 cooperate to restrict the movement of the swing arm 200 between the retracted position and the extended position. The internal cavity of the swing arm 200 is used to install some components of the power assembly 300. By setting the first limiting part 130 and the second limiting part 210 on the side of the first rotating shaft 110 near the friction wheel 321 and away from the cleaning component 110, the space of the connection area between the swing arm 200 and the fixing frame 100 can be fully utilized without occupying the internal space of the swing arm 200, thereby facilitating the installation of some components of the power assembly 300, reducing the volume of the swing arm 200, and reducing the volume of the cleaning assembly.

[0188] In some embodiments, the first limiting part 130 is located at the lower part of the fixing frame 100, and the second limiting part 210 is located at the upper part of the swing arm 200. For example, the second limiting part 210 is located at the upper part of the upper housing 240 of the swing arm 200. The first limiting part 130 and the second limiting part 210 are arranged in the external space of the swing arm 200 to avoid encroaching on the internal space of the swing arm 200. This facilitates the installation of some components of the power assembly 300 in the receiving cavity of the swing arm 200, improves the integration of the cleaning assembly, and reduces the volume of the cleaning assembly.

[0189] Referring to Figures 8 and 9, in one embodiment, the driving component 310 includes a rotating output shaft 311 and a driving output gear 312, with the driving output gear 312 fixed to the rotating output shaft 311. The second transmission assembly 330 includes a first rotary transmission assembly 331 and a second rotary transmission assembly 332. The input end of the first rotary transmission assembly 331 is connected to the driving output gear 312, and the output end of the second rotary transmission assembly 332 is connected to the cleaning component. The second rotary transmission assembly 332 includes two input ends. One input end of the second rotary transmission assembly 332 rotates in the same clockwise direction as the output end, while the other input end rotates in the opposite clockwise direction. The driving output gear 312 changes its rotation direction so that the output end of the first rotary transmission assembly 331 can be selectively connected to either input end of the second rotary transmission assembly 332.

[0190] During the use of the cleaning component, the rotation output shaft 311 of the drive component 310 needs to change its rotation direction to drive the swing arm 200 to move between the retracted and extended positions. However, the cleaning component needs to maintain a single rotation direction to avoid dust and other contaminants from polluting the cleaned surface and to facilitate cleaning. The rotation direction of the drive output gear 312 is the same as that of the rotation output shaft 311. When the drive output gear 312 rotates in different clockwise directions, the output end of the first rotary transmission component 331 is connected to the two input ends of the second rotary transmission component 332, thereby keeping the rotation direction of the cleaning component constant and ensuring the cleaning effect.

[0191] The two input ends of the second rotary transmission assembly 332 are the first input end and the second input end, respectively. The number of gears from the first input end to the output end is one more or one less than the number of gears from the second input end to the output end, so that the rotation directions from the two input ends to the output end are different.

[0192] Of course, as some alternatives, the two input ends to the output end of the second rotary transmission assembly 332 may also have other different numbers of gears, or other methods, so that the rotation directions between the two input ends and the output end are different.

[0193] Referring to Figure 8, in one embodiment, the output end of the first rotary transmission component 331 is the second gear 3311; the two input ends of the second rotary transmission component 332 are the third gear 3321 and the fourth gear 3322, respectively; the second gear 3311 is movably and coaxially disposed between the third gear 3321 and the fourth gear 3322 along its axial direction, and ratchet teeth are provided on the sides of the third gear 3321 and the fourth gear 3322 facing the second gear 3311; the drive output gear 312 changes the rotation direction so that the ratchet teeth of the second gear 3311 can selectively mesh with the ratchet teeth of the third gear 3321 or the ratchet teeth of the fourth gear 3322. The second gear 3311 is movable along its axial direction, and the ratchet of the second gear 3311 does not simultaneously mesh with the ratchet of the third gear 3321 and the ratchet of the fourth gear 3322. By changing the rotation direction of the second gear 3311, the ratchet of the second gear 3311 can mesh with the ratchet of the third gear 3321 and the ratchet of the fourth gear 3322 respectively. This allows the output end of the first rotary transmission assembly 331 to be connected to the two input ends of the second rotary transmission assembly 332 respectively, so that when the rotation direction of the rotary output shaft 311 changes, the rotation direction of the cleaning component remains unchanged.

[0194] Referring to Figures 9 and 10, in one embodiment, the second rotary transmission assembly 332 includes a third gear 3321, a fourth gear 3322, a fifth gear 3324, and a sixth gear 3325. The sixth gear 3325 is fixed to the cleaning component or, after meshing with the second rotary transmission gear 3323, is fixed to the cleaning component so that the rotation of the sixth gear 3325 drives the cleaning component to rotate. The third gear 3321 directly meshes with the sixth gear 3325, the fourth gear 3322 meshes with the fifth gear 3324, and the fifth gear 3324 meshes with the sixth gear 3325. The third gear 3321 serves as one input end of the second rotary transmission assembly 332, and the fourth gear 3322 and fifth gear 3324 serve as the other input end. This ensures that one input end of the second rotary transmission assembly 332 rotates in the same direction as the output end, while the other input end rotates in the opposite direction. Consequently, when the output shaft 311 changes direction, the rotation direction of the cleaning component remains unchanged.

[0195] In another embodiment, the output end of the first rotary transmission component 331 is the second gear 3311; the two input ends of the second rotary transmission component 332 are the third gear 3321 and the fourth gear 3322, respectively. The second gear 3311 is connected to the third gear 3321 and the fourth gear 3322 through one-way bearings, so that when the second gear 3311 rotates in different clockwise directions, the second gear 3311 drives the third gear 3321 and the fourth gear 3322 to rotate respectively.

[0196] For example, the second gear 3311, the third gear 3321 and the fourth gear 3322 are respectively provided with shafts. The shaft of the second gear 3311 is connected to the shaft of the third gear 3321 through a one-way bearing, and the shaft of the second gear 3311 is connected to the shaft of the fourth gear 3322 through another one-way bearing, so that when the second gear 3311 rotates in different clockwise directions, it is transmitted to the second rotary transmission assembly 332 through the two input ends of the second rotary transmission assembly 332 respectively.

[0197] In one embodiment, the first rotary transmission assembly 331 includes one or more first rotary transmission gears 3312, so that the drive member 310 drives the second gear 3311 to rotate through the first rotary transmission assembly 331.

[0198] The second aspect of this application provides a cleaning device, including a device body and a cleaning component as described above, wherein a mounting bracket 100 of the cleaning component is installed on the device body. The cleaning device is configured to clean a surface to be cleaned. The cleaning device can be a vacuum cleaning robot, a mopping / brushing robot, a window-climbing robot, etc., and can have functions such as movement, sweeping, and vacuuming. The cleaning device includes a device body, a cleaning module, and a cleaning component, which are installed on the device body to clean the surface to be cleaned. The cleaning device may also have other components or modules, such as a control system, a propulsion system, etc. Please refer to existing cleaning devices; this application will not elaborate on these details.

[0199] The cleaning equipment of this application includes a relatively rotatable fixed frame 100 and a swing arm 200. A power component 300 drives the fixed frame 100 and the swing arm 200 to rotate relative to each other, thereby changing the cleaning range of the cleaning components. When cleaning ordinary surfaces, the cleaning components are in a normal cleaning mode, and the swing arm 200 is in the retracted position. When cleaning special areas such as corners, the cleaning components are in a special cleaning mode, and the swing arm 200 is in the extended position, thus cleaning areas that cannot be covered by the cleaning components in the normal cleaning mode. This increases the cleaning range, reduces blind spots, improves cleaning effectiveness, and effectively enhances user satisfaction. Therefore, this application effectively overcomes some practical problems in the prior art and thus has high utilization value and practical significance.

[0200] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A cleaning component, characterized in that, include: A mounting bracket (100) is configured to be connected to the main body of the cleaning equipment, and the wall surface of the mounting bracket (100) is provided with a convex surface (120). A swing arm (200) is rotatably connected to the fixed frame (100), and the swing arm (200) is provided with a rotatable cleaning component; A power assembly (300) drives the cleaning component to rotate, and the power assembly (300) drives the swing arm (200) to rotate relative to the fixed frame (100) so as to move the swing arm (200) between a retracted position and an extended position; the output end of the power assembly (300) that drives the swing arm (200) to rotate relative to the fixed frame (100) includes a friction wheel (321); When the friction wheel (321) abuts against the mating surface (120) and the friction wheel (321) rotates, there is a force between the friction wheel (321) and the mating surface (120), causing the friction wheel (321) to roll along the mating surface (120) and drive the swing arm (200) to rotate relative to the fixed frame (100); when the swing arm (200) is in the retracted position and the extended position, the friction wheel (321) does not abut against the mating surface (120).

2. The cleaning component according to claim 1, characterized in that, The power assembly (300) includes: Drive unit (310); The first transmission assembly (320) drives the swing arm (200) to rotate relative to the fixed frame (100) under the drive of the driving member (310); The second transmission assembly (330) drives the cleaning component to rotate under the drive of the drive member (310).

3. The cleaning component according to claim 2, characterized in that, The cleaning component has a regular cleaning mode and a special cleaning mode. In the regular cleaning mode, the swing arm (200) is in the retracted position, and in the special cleaning mode, the swing arm (200) is in the extended position. The drive unit (310) includes a rotation output shaft (311), which rotates in a first clockwise direction in the normal cleaning mode and rotates in a second clockwise direction in the special cleaning mode. When the rotation direction of the rotating output shaft (311) changes from the first clockwise direction to the second clockwise direction, the cleaning component switches from the conventional cleaning mode to the special cleaning mode; When the rotation direction of the rotating output shaft (311) changes from the second clockwise direction to the first clockwise direction, the cleaning component switches from the special cleaning mode to the regular cleaning mode.

4. The cleaning component according to claim 3, characterized in that, The cleaning component rotates in the same clockwise direction in both the special cleaning mode and the regular cleaning mode.

5. The cleaning component according to any one of claims 1 to 4, characterized in that, The accommodating surface (120) protrudes from the wall of the fixing frame (100).

6. The cleaning component according to claim 1, characterized in that, The mating surface (120) includes a first mating surface (121) and a second mating surface (122), which are projected along the axial direction of the friction wheel (321). The first end of the projection of the first mating surface (121) extends beyond the first end of the projection of the second mating surface (122), and the second end of the projection of the second mating surface (122) extends beyond the second end of the projection of the first mating surface (121). The first end and the second end are opposite ends. The power assembly (300) includes an external swing transmission assembly (322), which drives the friction wheel (321) to move along the axial direction of the friction wheel (321) so that the friction wheel (321) abuts against the first mating surface (121) and the second mating surface (122) respectively.

7. The cleaning component according to claim 6, characterized in that, When the swing arm (200) is in the retracted position, the friction wheel (321) is located beside the second end of the first mating surface (121), and the friction wheel (321) can abut against the second mating surface (122) after moving along the axial direction of the friction wheel (321). When the swing arm (200) is in the extended position, the friction wheel (321) is located beside the first end of the second mating surface (122), and the friction wheel (321) can abut against the first mating surface (121) after moving along the axial direction of the friction wheel (321).

8. The cleaning component according to claim 6, characterized in that, The external swing transmission assembly (322) includes: A wheel axle (3221) is provided, one of the wheel axle (3221) and the friction wheel (321) is provided with a tooth groove that is helical along the axial direction of the wheel axle (3221), and the other is provided with teeth that mate with the tooth groove; The first stop (3222) is disposed inside and / or outside the tooth groove; The second stop (3223) is disposed inside and / or outside the tooth groove; The teeth move along the tooth grooves to cause the friction wheel (321) to move axially along the wheel shaft (3221); the first stop (3222) and the second stop (3223) limit the stroke of the friction wheel (321) along the wheel shaft (3221).

9. The cleaning component according to claim 8, characterized in that, The first stop (3222) and the second stop (3223) are respectively disposed at both ends of the tooth groove. The first stop (3222) and the second stop (3223) restrict the movement of the tooth along the tooth groove, thereby restricting the stroke of the friction wheel (321) along the wheel shaft (3221).

10. The cleaning assembly according to claim 8, characterized in that, The external swing transmission assembly (322) includes: A first elastic element (3224) applies a force to the friction wheel (321) that reduces the pressure between the friction wheel (321) and the axle (3221), thereby reducing the frictional force between the friction wheel (321) and the axle (3221).

11. The cleaning assembly according to claim 10, characterized in that, A retaining ring (3211) is provided on the side of the friction wheel (321) near the first elastic member (3224). The retaining ring (3211) rotates with the friction wheel (321), and the first elastic member (3224) presses against the retaining ring (3211).

12. The cleaning component according to claim 11, characterized in that, When the friction wheel (321) rotates relative to the axle (3221), the torque of the friction force between the retaining ring (3211) and the friction wheel (3211) acting on the retaining ring (3211) is not greater than the torque of the first elastic element (3224) twisted to the threshold angle.

13. The cleaning component according to claim 12, characterized in that, The retaining ring (3211) has a limiting ring (3212) on the side near the first elastic member (3224), and the first elastic member (3224) is sleeved on the limiting ring (3212).

14. The cleaning component according to claim 11, characterized in that, The swing arm (200) is provided with an elastic element mounting part (220), and the end of the first elastic element (3224) away from the friction wheel (321) presses against the elastic element mounting part (220).

15. The cleaning assembly according to claim 14, characterized in that, The first elastic element (3224) is sleeved on the outside of the wheel axle (3221), the elastic element mounting part (220) is disposed on the upper housing of the swing arm 200, and the wheel axle (3221) extends through the elastic element mounting part (220) into the swing arm (200).

16. The cleaning assembly according to claim 14, characterized in that, The elastic element mounting part (220) is provided with a limiting protrusion (221) on the side facing the friction wheel (321), and the first elastic element (3224) is sleeved on the limiting protrusion (221).

17. The cleaning component according to claim 8, characterized in that, The outer wall of the axle (3221) is provided with a toothed groove that is spiral in shape along the axial direction of the axle (3221), and the friction wheel (321) is provided with teeth that cooperate with the toothed groove; A cover plate (3226) is fixed to the end of the axle (3221), and the outer diameter of the cover plate (3226) is larger than the outer diameter of the axle (3221). The first stop (3222) is disposed on the cover plate (3226) and extends toward the axle (3221) to block one end of the tooth groove.

18. The cleaning component according to any one of claims 1 to 4 or 6 to 17, characterized in that, include: The second elastic element (400) is disposed at one end in the swing arm (200) and at the other end in the fixed frame (100); When the swing arm (200) is in the retracted position, the second elastic element (400) applies a force to the swing arm (200) that tends to rotate in a third clockwise direction, so that the friction wheel (321) disengages from the mating surface (120), the third clockwise direction being the rotation direction of the swing arm (200) from the extended position to the retracted position; when the swing arm (200) is in the extended position, the second elastic element (400) applies a force to the swing arm (200) that tends to rotate in a fourth clockwise direction, so that the friction wheel (321) disengages from the mating surface (120), the fourth clockwise direction being the rotation direction of the swing arm (200) from the retracted position to the extended position.

19. The cleaning assembly according to claim 18, characterized in that, When the friction wheel (321) rolls along the mating surface (120) to the edge of the mating surface (120), the torque of the second elastic element (400) acting on the swing arm (200) is greater than or equal to the resistance torque of the swing arm (200) moving in the direction of the friction wheel (321) away from the mating surface (120).

20. The cleaning assembly according to claim 18, characterized in that, The torque exerted on the swing arm (200) by the force between the friction wheel (321) and the mating surface (120) is greater than the resistance torque of the initial swing of the swing arm (200). The resistance torque of the initial swing of the swing arm (200) includes the torque exerted on the swing arm (200) by the second elastic element (400) and the torque exerted on the swing arm (200) by the friction force between the swing arm (200) and the fixed frame (100).

21. The cleaning assembly according to claim 18, characterized in that, When the swing arm (200) switches between the retracted position and the extended position, the motion path of the line of action of the force applied by the second elastic element (400) to the swing arm (200) passes through the axis of rotation between the swing arm (200) and the fixed frame (100).

22. The cleaning component according to claim 1, characterized in that, The fixing frame (100) is provided with a first limiting part (130); The swing arm (200) is provided with a second limiting part (210); The first limiting part (130) cooperates with the second limiting part (210) to restrict the movement of the swing arm (200) between the retracted position and the extended position.

23. The cleaning component according to claim 22, characterized in that, The second limiting part (210) is a limiting groove, and the first limiting part (130) is a limiting block inserted into the limiting groove. When the swing arm (200) is in the retracted position and the extended position, the limiting block moves to the two ends of the limiting groove respectively.

24. The cleaning component according to claim 23, characterized in that, The swing arm (200) and the fixed frame (100) are rotatably connected via a first rotating shaft (110); The limiting block is an arc-shaped block, and the center of the arc-shaped block is on the axis of the first rotating shaft (110); there is a gap between the limiting block and the first rotating shaft (110); the limiting groove is an arc-shaped groove.

25. A cleaning device, characterized in that, It includes a device body and a cleaning component as described in any one of claims 1 to 24, wherein the mounting bracket (100) of the cleaning component is mounted on the device body.

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