Power wheel and cleaning equipment

Abstract

The invention discloses a power wheel and cleaning equipment, the cleaning equipment can be a sweeping robot, a multifunctional cleaning base station or a dust collector, the cleaning equipment comprises the power wheel, the power wheel comprises a main body, the main body comprises a hub and a tire, and the tire is coaxial with the hub and arranged on the periphery of the hub. Wherein at least one of the tire, the hub and the tire and the hub is provided with a redundant space, and the redundant space is configured to enable at least one side, in the axis direction of the main body, of the tire to deform in the direction close to the hub when the tire is subjected to external force. According to the power wheel and the cleaning equipment, the problem that in the prior art, a power wheel is difficult to climb over obstacles is solved.

Description

[0001] This application claims priority to Chinese Patent Application No. 2025206625791, filed on April 9, 2025, entitled "Power Wheel and Cleaning Equipment", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of floor cleaning, and more specifically, to a power wheel and cleaning equipment. Background Technology

[0003] Most cleaning equipment on the market is equipped with anti-slip wheels. Anti-slip wheels have grooves on the outer circumference of the tire, which increases the sliding friction of the wheel and makes it less likely for the wheel to slip on wet surfaces.

[0004] However, creating grooves on the outer circumference of the drive wheel only provides limited improvement in friction between the drive wheel and the obstacle. When the obstacle is large, the drive wheel has difficulty climbing over it. Summary of the Invention

[0005] The main objective of this application is to provide a power wheel and a cleaning device to at least solve the problem that power wheels have difficulty climbing over obstacles in the prior art.

[0006] According to one aspect of this application, a drive wheel is provided, the drive wheel comprising: The main body includes a hub and a tire, wherein the tire is coaxial with the hub and disposed on the outer periphery of the hub; Wherein, at least one of the tire, the hub, and the tire and the hub has a redundant space, and the redundant space is configured to cause the tire to deform on at least one side along the axial direction of the body in a direction close to the hub when the tire is subjected to an external force.

[0007] Furthermore, a thinning portion is provided on the side of the wheel hub near the tire, and the thinning portion and the tire enclose the redundant space; and / or, Along the axial direction of the main body, at least one side of the tire protrudes from the hub, such that the redundant space is formed between the tire protruding from the hub and the hub; and / or, The tire has a cavity located on the side of the tire closest to the wheel hub, and the cavity forms the redundant space.

[0008] Furthermore, along the axial direction of the main body, the hub includes opposing first and second side surfaces; The cavity includes a first cavity along the axial direction of the main body. The first cavity has a first expansion section and a first straight section. The first expansion section extends to the first side surface, and along the direction from the first side surface to the second side surface, the cross-section of the first expansion section gradually decreases, while the cross-section of the first straight section remains unchanged; and / or, The cavity includes a second cavity along the axial direction of the main body. The second cavity has a second expansion section and a second straight section. The second expansion section extends to the second side and, along the direction from the first side to the second side, the cross-section of the second expansion section gradually increases, while the cross-section of the second straight section remains unchanged.

[0009] Furthermore, along the axial direction of the main body, the maximum width H1 of the first expansion section and the width L of the tire satisfy the following relationship: 0.067 ≤ H1 / L ≤ 0.267; and / or, Along the axial direction of the main body, the maximum width H2 of the second expansion section and the width L of the tire satisfy the following relationship: 0.067≤H2 / L≤0.267.

[0010] Furthermore, along the axial direction of the main body, at least one end of the outer peripheral surface of the hub is provided with a chamfer, and the chamfer forms the thinned portion.

[0011] Furthermore, along the axial direction of the main body, the maximum width H3 of the chamfer and the width L of the tire satisfy the following relationship: 0.067≤H3 / L≤0.2.

[0012] Furthermore, along the axial direction of the main body, the hub includes opposing first and second side surfaces; Wherein, the tire has a first annular flange, the first annular flange protruding from the first side surface along the axial direction of the main body, and the first annular flange and the first side surface enclosing the redundant space; and / or, The tire has a second annular flange that protrudes from the second side surface along the axial direction of the main body, and the second annular flange and the second side surface enclose the redundant space.

[0013] Furthermore, along the axial direction of the main body, the width L1 of the first annular flange protruding from the first side surface satisfies the relationship L between the width L of the tire and the width L of the first annular flange: 0.067≤L1 / L≤0.200; Along the axial direction of the main body, the width L2 of the second annular flange protruding from the second side surface satisfies the relationship between the width L of the tire and the width L of the second annular flange: 0.067≤L2 / L≤0.200.

[0014] Furthermore, the side of the tire facing away from the first annular flange is flush with the second side surface. Along the axial direction of the main body, the width L1 of the first annular flange protruding from the first side surface satisfies the relationship: 0.133 ≤ L1 / L ≤ 0.400; or... The side of the tire away from the second annular flange is flush with the first side surface. Along the axial direction of the main body, the width L2 of the first annular flange protruding from the first side surface and the width L of the tire satisfy the following relationship: 0.133≤L2 / L≤0.400.

[0015] Furthermore, the cavity includes multiple cavities, which are spaced apart along the circumferential direction of the tire; Wherein, the maximum length L3 of the cavity along the radial direction of the body and the width L of the tire satisfy the relationship: 0.033≤L3 / L≤0.333; and / or, The maximum width L4 of the cavity along the axis of the body and the width L of the tire satisfy the following relationship: 0.033≤L4 / L≤0.333.

[0016] On the other hand, this application also provides a cleaning device, which includes the aforementioned power wheel.

[0017] Furthermore, the cleaning device includes two drive wheels, which are spaced apart at the bottom of the cleaning device. Along the axial direction of the drive wheels, the hub of each drive wheel includes a first side and a second side. The sides of the two hubs that are close to each other are the first side of the two hubs, and the sides of the two hubs that are far apart from each other are the second side of the two hubs.

[0018] Compared to existing technologies, this application provides redundant space in at least one of the tire, the hub, and the space between the tire and the hub. When the drive wheel crosses an obstacle, the tire is subjected to the external force of the obstacle, causing the tire to deform on at least one side along the axis of the main body and in the direction closer to the hub. At this time, the volume of the redundant space is reduced, and the tire is concave on one side along the circumferential direction of the main body, which increases the contact area between the obstacle and the outer surface of the tire, thereby increasing the friction between the tire and the obstacle and thus improving the obstacle-crossing ability of the drive wheel. Attached Figure Description The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a structural schematic diagram of the first type of power wheel disclosed in this application from a first-person perspective. Figure 2 This is a structural schematic diagram of the first type of power wheel disclosed in this application from a second-view perspective. Figure 3 This is a cross-sectional view of the first type of power wheel disclosed in this application; Figure 4 for Figure 3 Enlarged schematic diagram of region I; Figure 5 This is a structural schematic diagram of the second type of power wheel disclosed in this application; Figure 6 This is a cross-sectional view of the second type of power wheel disclosed in this application; Figure 7 This is a cross-sectional view of the third type of power wheel disclosed in this application; Figure 8 This is a structural schematic diagram of the fourth type of power wheel disclosed in this application; Figure 9 This is a cross-sectional view of the fourth type of power wheel disclosed in this application; Figure 10 This is a cross-sectional view of the fifth type of power wheel disclosed in this application.

[0019] The above figures include the following reference numerals: 10. Main body; 11. Tire; 12. Wheel hub; 30. Redundant space; 111. First annular flange; 112. Second annular flange; 113. Limiting protrusion; 114. Cavity; 115. First protrusion; 121. First side; 122. Second side; 123. Thinning section; 124. Chamfer; 125. Limiting groove; 1141. First cavity; 1142. Second cavity; 11411. First expansion section; 11412. First straight section; 11421. Second expansion section; 11422. Second straight section. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0022] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0023] See Figures 1 to 10 As shown, according to an embodiment of this application, a cleaning device is provided. The cleaning device can be a robotic vacuum cleaner, a multi-functional cleaning base station, or a vacuum cleaner. The cleaning device includes a drive wheel, which includes a main body 10. The main body 10 includes a hub 12 and a tire 11. The tire 11 is coaxial with the hub 12 and disposed on the outer periphery of the hub 12. At least one of the tire 11, the hub 12, and the space between the tire 11 and the hub 12 has a redundant space 30. The redundant space 30 is configured such that when the tire 11 is subjected to an external force, the tire 11 moves along the axial direction of the main body 10 (as shown in the attached diagram). Figure 1 At least one side of the wheel (in the X direction) is deformed in the direction close to the hub 12.

[0024] Specifically, in this embodiment, at least one of the tire 11, the hub 12, and the space between the tire 11 and the hub 12 is provided with a redundant space 30. When the drive wheel crosses an obstacle, the tire 11 is subjected to the external force of the obstacle, causing the tire 11 to deform on at least one side along the axial direction of the main body 10 and along the direction closer to the hub 12. At this time, the volume of the redundant space 30 is reduced, and the tire 11 is concave on one side along the circumferential direction of the main body 10, which increases the contact area between the obstacle and the outer surface of the tire 11, thereby increasing the friction between the tire 11 and the obstacle, thus improving the obstacle crossing ability of the drive wheel.

[0025] Furthermore, a thinning portion 123 is provided on the side of the wheel hub 12 near the tire 11, and a redundant space 30 is formed between the thinning portion 123 and the tire 11.

[0026] Specifically, the thinning portion 123 is disposed on at least one side of the hub 12 corresponding to the tire 11 along the axial direction of the main body 10. Since the thinning portion 123 is disposed on the side of the hub 12 close to the tire 11, a redundant space 30 is formed between the thinning portion 123 and the tire 11. When the drive wheel contacts an obstacle, the tire 11 is subjected to pressure from the obstacle, causing the tire 11 to deform and move in the direction close to the thinning portion 123. Because the outer peripheral surface of the tire 11 is concave, the contact area between the tire 11 and the obstacle is increased. On the other hand, it is understandable that since there is a certain angle between the deformed part of the tire 11 and the undeformed part of the tire 11, the external force exerted by the obstacle on the tire 11 can be decomposed into the width direction along the main body 10, that is, the obstacle has a certain lifting effect on the tire 11.

[0027] Optionally, along the axial direction of the main body 10, at least one side of the tire 11 protrudes from the hub 12, so that a redundant space 30 is formed between the tire 11 protruding from the hub 12 and the hub 12.

[0028] Understandably, when at least one side of the tire 11 protrudes from the rim 12, the groove formed between the protruding tire 11 and the rim 12 constitutes the redundant space 30. After the tire 11 contacts the ground, the protruding tire 11, lacking the support of the rim 12, deforms along the direction closest to the tire 11. The deformed tire 11 presses tightly against the outer surface of the obstacle, thereby increasing the contact area between the tire 11 and the obstacle. Similarly, the deformed portion of the tire 11 is subjected to external forces from the obstacle, causing the obstacle to tend to deform along the width direction of the main body 10, thus improving the obstacle-crossing ability of the drive wheel.

[0029] Optionally, a cavity 114 is provided on the tire 11, located on the side of the tire 11 near the hub 12, forming a redundant space 30. Specifically, when the tire 11 is subjected to an external force from an obstacle during obstacle crossing, the cavity 114 on the tire 11 allows the tire 11 to deform in the direction close to the hub 12, thereby increasing the contact area between the tire 11 and the obstacle and improving the obstacle crossing ability of the drive wheel.

[0030] Furthermore, along the axial direction of the body 10, the hub 12 includes opposing first side surface 121 and second side surface 122. In some embodiments, the cavity 114 includes a first cavity 1141. Along the axial direction of the body 10, the first cavity 1141 has a first expansion section 11411 and a first straight section 11412. The first expansion section 11411 extends to the first side surface 121, and along the direction from the first side surface 121 to the second side surface 122, the cross-section of the first expansion section 11411 gradually decreases, while the cross-section of the first straight section 11412 remains unchanged.

[0031] Understandably, since the first expansion section 11411 extends to the first side 121, and the cross-section of the first expansion section 11411 gradually decreases along the direction from the first side 121 to the second side 122, this means that when the drive wheel is crossing an obstacle, the tire 11 corresponding to the first expansion section 11411 has a stronger deformation capacity than the tire 11 corresponding to the first straight section 11412, further improving the obstacle-crossing ability of the tire 11. At the same time, it is understandable that if the deformation capacity of the tire 11 corresponding to the first straight section 11412 is too strong, this will lead to excessive rolling friction of the tire 11 during travel, ultimately causing the cleaning equipment to have low cleaning efficiency.

[0032] Optionally, the cavity 114 includes a second cavity 1142. Along the axial direction of the main body 10, the second cavity 1142 has a second expansion section 11421 and a second straight section 11422. The second expansion section 11421 extends to the second side 122, and along the direction from the first side 121 to the second side 122, the cross-section of the second expansion section 11421 gradually increases, while the cross-section of the second straight section 11422 remains unchanged.

[0033] Similarly, the tire 11 corresponding to the second expansion section 11421 has a greater degree of deformation than the tire 11 corresponding to the second straight section 11422. This avoids excessive rolling friction of the tire 11 on the one hand, and improves the obstacle crossing ability of the tire 11 on the other.

[0034] In one specific embodiment, the cleaning device includes two drive wheels, each with a first cavity 1141. The first cavities 1141 of the two tires are respectively formed on the first side 121 of the two drive wheels that are close to each other. That is, during the obstacle-crossing process, the tires 11 of the two drive wheels have stronger deformation capacity on the side that is close to each other, while the side of the two drive wheels that is far apart from each other provides a certain degree of support for the cleaning device under the action of the obstacle, thereby increasing the contact area between the drive wheels and the obstacle, and making it easier for the cleaning device to cross obstacles.

[0035] Furthermore, along the axial direction of the main body 10, the maximum width H1 of the first expansion section 11411 and the width L of the tire 11 satisfy the following relationship: 0.067≤H1 / L≤0.267.

[0036] Specifically, when the ratio between the maximum width H1 of the first expansion section 11411 and the width L of the tire 11 is too large, for example, H1 / L is greater than 0.267, on the one hand, the volume of the cavity 114 is too large, resulting in insufficient structural strength of the drive wheel; on the other hand, it leads to excessive deformation of the tire 11, resulting in excessive rolling friction of the tire 11, which affects the movement of the drive wheel. Conversely, if the ratio between the maximum width H1 of the first expansion section 11411 and the width L of the tire 11 is too low, for example, H1 / L is less than 0.067, this reduces the deformation capacity of the tire 11, making it difficult for the drive wheel to overcome larger obstacles.

[0037] Similarly, along the axial direction of the main body 10, the maximum width H2 of the second expansion section 11421 and the width L of the tire 11 satisfy the following relationship: 0.067 ≤ H2 / L ≤ 0.267. The values ​​of H1 / L and H2 / L can be 0.067, 0.117, 0.167, 0.217, and 0.267. Among them, the values ​​of H1 and H2 can be 2mm, 2.5mm, 3mm, 3.5mm, and 4mm, and the values ​​of L can be 15mm, 18mm, 20mm, 23mm, 25mm, 28mm, and 30mm.

[0038] Furthermore, along the axial direction of the main body 10, at least one end of the outer peripheral surface of the hub 12 is provided with a chamfer 124, which forms a thinning portion 123.

[0039] Specifically, along the axial direction of the main body 10, a chamfer 124 is provided at the first end of the outer peripheral surface of the hub 12, or a chamfer 124 can be provided at the second end of the outer peripheral surface of the hub 12, or both the first and second ends of the outer peripheral surface of the tire 11 can be provided with chamfers 124. When the outer peripheral surface of the tire 11 is provided with a chamfer 124, after the tire 11 comes into contact with an obstacle, part of the tire 11 deforms and moves in the direction close to the chamfer 124. Since there is a transition surface on the chamfer 124, the deformed tire 11 abuts against the transition surface of the chamfer 124. When the obstacle applies an external force to the deformed part of the tire 11, the tire 11 can transmit the external force to the hub 12 through the transition surface, thereby improving the lifting effect of the tire 11. In addition, the chamfer 124 in this embodiment can also reduce the stress concentration on the tire 11 or the hub 12, and improve the service life of the tire 11 and the hub 12 to a certain extent. Of course, in some embodiments, a groove can also be formed on the hub 12, and the groove forms a thinning part 123.

[0040] Furthermore, along the axial direction of the main body 10, the maximum width H3 of the chamfer 124 and the width L of the tire 11 satisfy the following relationship: 0.067≤H3 / L≤0.200.

[0041] It is understandable that the larger the maximum width H3 of the chamfer 124 is relative to the width L of the tire 11, the larger the volume of the redundant space 30. In this case, the structural strength of the drive wheel is lower, and the deformation of the tire 11 is excessive, resulting in excessive rolling friction. Conversely, the smaller the maximum width H of the chamfer 124 is relative to the width L of the tire 11, the smaller the transition surface on the chamfer 124, and the relatively smaller the volume of the redundant space 30, resulting in lower deformation capacity of the tire 11. Therefore, in this embodiment, the maximum width H3 of the chamfer 124 is set to satisfy the above relationship. The deformation of the drive wheel is not too low, preventing the drive wheel from having difficulty overcoming obstacles; and the rolling friction of the drive wheel is not too high, preventing the cleaning efficiency of the cleaning equipment from being too low. The value of H3 / L can be 0.067, 0.080, 0.100, 0.120, 0.140, 0.160, 0.180, or 0.200. The value of H can be 2.0mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm and 3.0mm.

[0042] In some embodiments, along the axial direction of the body 10, the hub 12 includes a first side surface 121 and a second side surface 122 opposite to each other; wherein, the tire 11 has a first annular flange 111, the first annular flange 111 protruding from the first side surface 121 along the axial direction of the body 10, and the first annular flange 111 and the first side surface 121 enclose a redundant space 30.

[0043] Specifically, the first annular flange 111 protrudes from the first side surface 121 and forms a groove around the first side surface 121, creating a redundant space 30. When the drive wheel crosses an obstacle, after the first annular flange 111 contacts the obstacle, the obstacle applies a supporting force to the first annular flange 111, causing the first annular flange 111 to deform in a direction closer to the first side surface 121. After deformation, the first annular flange 111 fits more closely against the outer surface of the obstacle, thereby increasing the contact area between the tire 11 and the obstacle.

[0044] Optionally, the tire 11 has a second annular flange 112, which protrudes from the second side surface 122 along the axial direction of the main body 10, and the second annular flange 112 and the second side surface 122 enclose a redundant space 30.

[0045] Similarly, after the second annular flange 112 comes into contact with the obstacle, the second annular flange 112 deforms and deforms in the direction close to the second side 122, so that the second annular flange 112 is closer to the obstacle, increasing the friction between the drive wheel and the obstacle, and improving the obstacle-crossing ability of the drive wheel to a certain extent.

[0046] In some embodiments, along the axial direction of the body 10, the width L1 of the first annular flange 111 protruding from the first side surface 121 and the width L of the tire 11 satisfy the relationship: 0.067≤L1 / L≤0.200; the width L2 of the second annular flange 112 protruding from the second side surface 122 and the width L of the tire 11 satisfy the relationship: 0.067≤L2 / L≤0.200.

[0047] In other words, in these embodiments, the tire 11 is provided with not only a first annular flange 111, but also a second annular flange 112. Both the first annular flange 111 and the second annular flange 112 can increase the friction between the drive wheel and the obstacle after contacting it, thereby improving the drive wheel's obstacle-crossing ability. Furthermore, when L1 and L2 satisfy the above relationship, the portion of the tire 11 protruding from the hub 12 will not be excessively large, thus avoiding an excessively large area of ​​the tire 11 protruding from the hub 12, which would lead to an excessive increase in the rolling friction of the drive wheel. Simultaneously, the width of the first annular flange 111 protruding from the first side 121 and the width of the second annular flange 112 protruding from the second side 122 will not be too low, preventing the first annular flange 111 or the second annular flange 112 from deforming and failing to adhere tightly to the obstacle, thus preventing the first annular flange 111 and the second annular flange 112 from failing to increase the friction between the drive wheel and the obstacle. The values ​​of L1 / L and L2 / L can be 0.067, 0.100, 0.120, 0.150, 0.180, and 0.200. Among them, the values ​​of L1 and L2 can be 2.0mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, and 3.0mm.

[0048] Furthermore, the sum of L1 and L2 satisfies the relationship: 4.0mm≤L1+L2≤6.0mm. When the sum of L1 and L2 satisfies the above relationship, the width of the tire 11 along the axis of the main body 10 will not be too wide, so as to avoid the tire 11 protruding too much from the hub 12, which would lead to an excessive increase in the rolling friction of the tire 11; the width of the tire 11 along the axis of the main body 10 will not be too narrow, so as to avoid the problem that the friction between the tire 11 and the obstacle will not increase much after the tire 11 deforms during the obstacle crossing process.

[0049] In one specific embodiment, the cleaning device includes two drive wheels, and the tires 11 of both drive wheels include a first annular flange 111 and a second annular flange 112. The first annular flange 111 protrudes from the first side surface 121 along the axial direction of the main body 10 with a width of 2.5mm, and the second annular flange 112 protrudes from the second side surface 122 along the axial direction of the main body 10 with a width of 2.5mm.

[0050] In some embodiments, the side of the tire 11 opposite to the first annular flange 111 is flush with the second side surface 122, and the width L1 of the first annular flange 111 protruding from the first side surface 121 along the axial direction of the body 10 satisfies the relationship: 4.0mm≤L1≤6.0mm.

[0051] Specifically, in this embodiment, since the side of the tire 11 facing away from the first annular flange 111 is flush with the second side surface 122, i.e., L2 is 0 at this time, the width L1 of the first annular flange 111 protruding from the first side surface 121 cannot be set too high. That is, if L1 is greater than 6.0mm, since the first annular flange 111 is too long and does not have the support of the hub 12, the first annular flange 111 may be easily damaged by external forces when the drive wheel is moving. If L1 is less than 4.0mm, the first annular groove may not be able to effectively support the obstacle after the first annular flange 111 is deformed, i.e., the increase in friction between the drive wheel and the obstacle is not significant. The value of L1 can also be 4.0mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm, 5.0mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, and 6.0mm.

[0052] Similarly, in other embodiments, the side of the tire 11 opposite to the second annular flange 112 is flush with the first side surface 121, and the width L2 of the first annular flange 111 protruding from the first side surface 121 along the axial direction of the main body 10 satisfies the relationship: 4.0mm ≤ L2 ≤ 6.0mm. The value of L2 can also be 4.0mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm, 5.0mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, and 6.0mm.

[0053] It is worth mentioning that, in the actual manufacturing of the power wheel, instead of increasing the width of the tire 11 along the axis of the main body 10 to make the tire 11 protrude from the hub 12, the width of the hub 12 along the axis of the main body 10 is reduced, so that the first annular flange 111 protrudes from the first side 121, or the second annular flange 112 protrudes from the second side 122. The advantages of this design are twofold: firstly, it keeps the overall volume of the power wheel relatively constant, avoiding significant changes in the power wheel's volume that would necessitate adjustments to other components of the cleaning equipment; secondly, since the hub 12 typically needs to connect a rotating shaft, and because the width of the hub 12 along the axis of the main body 10 is reduced, the length of the rotating shaft also needs to be reduced, thus lowering the manufacturing cost of the power wheel to some extent.

[0054] In one specific embodiment, the cleaning device includes two drive wheels, which are spaced apart at the bottom of the cleaning device. Along the axial direction of the drive wheels, the hub 12 of each drive wheel includes a first side 121 and a second side 122 opposite to each other. The sides of the two hubs 12 that are close to each other are the first side 121 of the two hubs 12, and the sides of the two hubs 12 that are far apart from each other are the second side 122 of the two hubs 12.

[0055] The first annular flange 111 of each of the two drive wheels protrudes 5.0 mm from its first side surface 121, while the second annular flange 112 of each drive wheel is flush with its second side surface 122. It is understood that, at this point, the annular flanges are located inside the two drive wheels. When the drive wheels contact an obstacle, the external force on the first annular flange 111 of both drive wheels can be distributed along the width direction and the axial direction of the main body 10, thus allowing the external force exerted by the obstacle on the drive wheels to lift them to a certain extent. Of course, in some embodiments, the first annular flange 111 of both drive wheels is flush with its first side surface 121, and the second annular flange 112 of both drive wheels protrudes from its second side surface 122. This design also allows the second annular flange 112 to deform, generating an external force that lifts the tire, thereby improving the tire's obstacle-crossing ability to a certain extent.

[0056] As attached Figure 6 As shown, the cavity 114 includes multiple cavities, which are spaced apart along the circumferential direction of the tire 11; wherein, the maximum width L3 of the cavity 114 along the radial direction of the body 10 satisfies the relationship between the width L of the tire 11 and the maximum width L of the cavity 114: 0.033≤L3 / L≤0.333.

[0057] Understandably, because the tire 11 has a cavity 114, it is easier for the tire 11 to deform along the direction closer to the hub 12 after contacting an obstacle, thereby increasing the contact area between the outer surface of the tire 11 and the obstacle. Furthermore, the larger the length L3 of the cavity 114 along the radial direction of the main body 10 (e.g., L3 / L greater than 0.333), the greater the deformation of the tire 11 after contacting the obstacle. However, a larger width L3 of the cavity 114 means a larger volume occupied by the cavity 114 relative to the tire 11, ultimately resulting in excessive rolling friction of the tire 11. Conversely, a smaller length L3 of the cavity 114 along the radial direction of the main body 10 (e.g., L3 / L less than 0.033), the lower the deformation of the tire 11 under external force, making it difficult to improve the tire 11's obstacle-crossing ability. Therefore, considering both the deformation degree and structural strength of tire 11, the value of L3 should satisfy the above relationship, and the value of L3 / L can be 0.033, 0.050, 0.100, 0.150, 0.200, 0.250, 0.300, and 0.333. The value of L3 can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, and 5mm. Preferably, L3 is 3.0mm to prevent excessive rolling friction of tire 11, and at this point, tire 11 has good deformation capacity.

[0058] Optionally, the maximum width L4 of the cavity 114 along the axial direction of the body 10 and the width L of the tire 11 satisfy the following relationship: 0.033≤L4 / L≤0.333.

[0059] Similarly, when L4 is too large relative to the width L of tire 11, for example, when L4 / L is greater than 0.333, the volume of cavity 114 is relatively large, and the deformation capacity of tire 11 is too high, resulting in greater rolling friction of tire 11. Conversely, when L4 / L is less than 0.033, the deformation capacity of the tire is too low, which may make it difficult for tire 11 to overcome obstacles. The value of L4 / L can be 0.033, 0.050, 0.100, 0.150, 0.200, 0.250, 0.300, and 0.333. The value of L4 can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, and 5mm.

[0060] In some embodiments, the outer surface of the tire 11 is provided with a plurality of first protrusions 115, and a groove is provided between two adjacent first protrusions 115. The plurality of first protrusions 115 are spaced apart along the circumferential direction of the tire 11, and each first protrusion 115 corresponds one-to-one with each cavity 114 in the radial direction of the tire 11.

[0061] Specifically, after the first protrusion 115 comes into contact with an obstacle, since the first protrusion 115 is provided with a cavity 114 in the radial direction of the tire 11, the first protrusion 115 will be recessed in the direction close to the cavity 114, so that the inner wall surface of the first protrusion 115 and the groove between two adjacent first protrusions 115 can come into contact with the obstacle, thereby increasing the friction between the obstacle and the tire 11 and improving the obstacle-crossing ability of the drive wheel.

[0062] Furthermore, a limiting protrusion 113 is provided on one of the sides of the tire 11 near the rim 12 and the side of the rim 12 near the tire 11, and a limiting groove 125 adapted to the limiting protrusion 113 is provided on the other side, with the limiting protrusion 113 embedded in the limiting groove 125.

[0063] In some existing cleaning equipment, the drive wheel is usually glued to the outer circumference of the hub 12. Although this connection method is relatively reliable, it results in poor deformation ability of the tire 11, leading to poor obstacle-crossing ability of the drive wheel. In this embodiment, a limiting protrusion 113 is provided on one of the sides of the tire 11 near the hub 12 and the side of the hub 12 near the tire 11, and a limiting groove 125 adapted to the limiting protrusion 113 is provided on the other side. The tire 11 is fixed to the outer circumference of the hub 12 by snap-fit, avoiding excessive support force from the hub 12 on the tire 11, which would make it difficult for the tire 11 to deform.

[0064] Preferably, a limiting protrusion 113 is provided on the side of the tire 11 near the rim 12, and a limiting groove 125 is provided on the side of the rim 12 near the tire 11. Specifically, if the limiting protrusion 113 is provided on the side of the rim 12 near the tire 11, and the limiting groove 125 is provided on the side of the tire 11 near the rim 12, the limiting protrusion 113 is usually integrally formed with the rim 12. Since the rim 12 is usually made of hard rubber or metal and has high strength, the limiting protrusion 113 passing through the limiting groove 125 will affect the flexibility and elasticity of the rim 12, ultimately resulting in poor deformation ability of the tire 11. However, if the limiting protrusion 113 is provided on the tire 11, then the limiting protrusion 113 is integrally formed with the tire 11. The limiting protrusion 113 is usually made of rubber, which has good elasticity and flexibility, and will not affect the deformation ability of the tire 11.

[0065] In addition, this application provides some data to verify the climbing ability of the cleaning equipment. The cleaning equipment of this application can cross a step with a maximum width of 44mm when the drive wheel is dry, a circular tube with a radius of at least 40mm that can be crossed, and a threshold with a maximum width of 42mm that can be crossed. In contrast, the drive wheel of existing cleaning equipment can only cross a step with a maximum width of 40mm and a threshold with a maximum width of 38mm when the drive wheel is dry. Obviously, the obstacle crossing ability of the drive wheel of the cleaning equipment of this application is superior to that of the prior art.

[0066] In summary, the power wheel and cleaning equipment of this application have at least the following beneficial technical effects: (1) A redundant space 30 is provided between the tire 11, the hub 12 and the tire 11 and the hub 12. When the tire 11 contacts the obstacle, at least one side of the tire 11 along the axis of the main body 10 deforms in the direction close to the hub 12, and the outer surface of the tire 11 is concave, which increases the contact area between the outer surface of the tire 11 and the obstacle, thereby increasing the friction between the tire 11 and the obstacle and improving the obstacle crossing ability of the power wheel.

[0067] (2) By providing a cavity 114 on the tire 11, and the cavity having an expansion section and a straight section, the expansion section extends to one side of the tire 11 along the axial direction, thereby increasing the volume of the cavity 114, which improves the deformation ability of the tire 11 after contacting the obstacle, and makes it easier for the drive wheel to cross the obstacle.

[0068] (3) By setting a chamfer 124, a first annular flange 111 or a second annular flange 112 in the redundant space 30 between the tire 11 and the hub 12, the tire 11 deforms in the direction close to the hub 12 after it comes into contact with the obstacle, thereby increasing the contact area between the tire 11 and the obstacle and improving the obstacle crossing ability of the power wheel.

[0069] (4) A cavity 114 is provided on the tire 11 to improve the deformation capacity of the tire 11 so that the friction between the tire 11 and the obstacle can be increased when the tire 11 crosses the obstacle.

[0070] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0071] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0072] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A power wheel, characterized in that, include: The main body (10) includes a hub (12) and a tire (11), the tire (11) being coaxial with the hub (12) and disposed on the outer periphery of the hub (12); Wherein, at least one of the tire (11), the hub (12) and the tire (11) and the hub (12) has a redundant space (30), the redundant space (30) being configured to cause the tire (11) to deform on at least one side of the body (10) along the axial direction in a direction close to the hub (12) when the tire (11) is subjected to an external force.

2. The power wheel according to claim 1, characterized in that, The wheel hub (12) has a thinning portion (123) on the side near the tire (11), and the thinning portion (123) and the tire (11) enclose the redundant space (30); and / or, Along the axial direction of the main body (10), at least one side of the tire (11) protrudes from the hub (12) such that the redundant space (30) is formed between the tire (11) protruding from the hub (12) and the hub (12); and / or, The tire (11) has a cavity (114) located on the side of the tire (11) near the hub (12), and the cavity (114) forms the redundant space (30).

3. The power wheel according to claim 2, characterized in that, Along the axial direction of the body (10), the hub (12) includes opposing first side (121) and second side (122). The cavity (114) includes a first cavity (1141) along the axial direction of the main body (10). The first cavity (1141) has a first expansion section (11411) and a first straight section (11412). The first expansion section (11411) extends to the first side (121), and along the direction from the first side (121) to the second side (122), the cross-section of the first expansion section (11411) gradually decreases, while the cross-section of the first straight section (11412) remains unchanged; and / or, The cavity (114) includes a second cavity (1142) along the axial direction of the main body (10). The second cavity (1142) has a second expansion section (11421) and a second straight section (11422). The second expansion section (11421) extends to the second side (122). Along the direction from the first side (121) to the second side (122), the cross-section of the second expansion section (11421) gradually increases, while the cross-section of the second straight section (11422) remains unchanged.

4. The power wheel according to claim 3, characterized in that, Along the axial direction of the main body (10), the maximum width H1 of the first expansion section (11411) and the width L of the tire (11) satisfy the following relationship: 0.067 ≤ H1 / L ≤ 0.267; and / or, Along the axial direction of the main body (10), the maximum width H2 of the second expansion section (11421) and the width L of the tire (11) satisfy the following relationship: 0.067≤H2 / L≤0.

267.

5. The power wheel according to claim 2, characterized in that, Along the axial direction of the main body (10), at least one end of the outer peripheral surface of the hub (12) is provided with a chamfer (124), and the chamfer (124) forms the thinned portion (123).

6. The power wheel according to claim 5, characterized in that, Along the axial direction of the main body (10), the maximum width H3 of the chamfer (124) and the width L of the tire (11) satisfy the following relationship: 0.067≤H3 / L≤0.

2.

7. The power wheel according to claim 2, characterized in that, Along the axial direction of the body (10), the hub (12) includes opposing first side (121) and second side (122). The tire (11) has a first annular flange (111) that protrudes from the first side surface (121) along the axial direction of the body (10), and the first annular flange (111) and the first side surface (121) enclose the redundant space (30); and / or, The tire (11) has a second annular flange (112) that protrudes from the second side surface (122) along the axial direction of the body (10), and the second annular flange (112) and the second side surface (122) enclose the redundant space (30).

8. The power wheel according to claim 7, characterized in that, Along the axial direction of the main body (10), the width L1 of the first annular flange (111) protruding from the first side surface (121) satisfies the relationship between the width L of the tire (11): 0.067≤L1 / L≤0.200; Along the axial direction of the main body (10), the width L2 of the second annular flange (112) protruding from the second side surface (122) satisfies the relationship between the width L of the tire (11): 0.067≤L2 / L≤0.

200.

9. The power wheel according to claim 7, characterized in that, The side of the tire (11) facing away from the first annular flange (111) is flush with the second side surface (122). Along the axial direction of the main body (10), the width L1 of the first annular flange (111) protruding from the first side surface (121) satisfies the relationship between the width L of the tire (11) and the width L of the first annular flange (111) as follows: 0.133 ≤ L1 / L ≤ 0.400; or, The tire (11) is flush with the first side surface (121) on the side away from the second annular flange (112). Along the axial direction of the main body (10), the width L2 of the first annular flange (111) protruding from the first side surface (121) and the width L of the tire (11) satisfy the following relationship: 0.133≤L2 / L≤0.

400.

10. The power wheel according to any one of claims 2 to 9, characterized in that, The cavity (114) includes a plurality of cavities, which are spaced apart along the circumferential direction of the tire (11); Wherein, the maximum length L3 of the cavity (114) along the radial direction of the body (10) satisfies the relationship L between the width L of the tire (11): 0.033 ≤ L3 / L ≤ 0.333; and / or, The maximum width L4 of the cavity (114) along the axial direction of the body (10) satisfies the relationship between the width L of the tire (11): 0.033≤L4 / L≤0.

333.

11. A cleaning device, characterized in that, The cleaning device includes the power wheel as described in any one of claims 1 to 10.

12. The cleaning equipment according to claim 11, characterized in that, The cleaning device includes two drive wheels, which are spaced apart at the bottom of the cleaning device. Along the axial direction of the drive wheels, each drive wheel hub (12) includes a first side (121) and a second side (122) opposite to each other. The sides of the two hubs (12) that are close to each other are the first side (121) of the two hubs (12), and the sides of the two hubs (12) that are far apart from each other are the second side (122) of the two hubs (12).

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