Tire and cleaning equipment

Abstract

The utility model discloses a tire and cleaning equipment, the cleaning equipment comprises the tire, the tire comprises a main body, the peripheral surface of the main body is provided with at least two circles of bulges, and the at least two circles of bulges are arranged at intervals along the axial direction of the main body; each circle of protrusions comprises a plurality of protrusions, the protrusions in the same circle of protrusions are arranged at intervals in the circumferential direction of the body, the heights of the portions, protruding out of the outer circumferential face of the body, of every two adjacent circles of protrusions are the same, a first groove is formed between every two adjacent protrusions, a plurality of cavities are further formed in the body, and the cavities are located on the sides, close to the center of the body, of the protrusions. Wherein the multiple cavities and the multiple protrusions are arranged in a one-to-one correspondence mode, and the centers of the corresponding cavities and the centers of the corresponding protrusions are sequentially arranged in the same radial direction of the main body. According to the tire and the cleaning equipment, the problem that in the prior art, a tire is prone to slipping on the wet ground is solved.

Description

Technical Field

[0001] The present application relates to the field of floor cleaning, and in particular to a tire and cleaning equipment. Background Art

[0002] Currently, most cleaning equipment on the market is equipped with tires that have tread patterns or grooves on the tire surface to improve the tire's obstacle-crossing ability, thereby increasing the friction between the tire and the obstacle and thus improving the tire's obstacle-crossing ability.

[0003] However, providing tread patterns or grooves on the tire does not improve the sliding friction coefficient of the tire, making the tire prone to slipping on wet ground. Utility Model Content

[0004] The main purpose of the present application is to provide a tire and cleaning equipment to at least solve the problem in the prior art that tires are prone to slipping on wet ground.

[0005] According to one aspect of the present application, there is provided a tire comprising:

[0006] A main body, wherein the outer circumferential surface of the main body is provided with at least two circles of protrusions, and the at least two circles of protrusions are spaced apart along the axial direction of the main body;

[0007] Each circle of the protrusions includes a plurality of protrusions, and the plurality of protrusions in the same circle of the protrusions are spaced apart along the circumferential direction of the main body. The protrusions of two adjacent circles protrude from the outer circumferential surface of the main body at the same height, and a first groove is provided between two adjacent protrusions. The main body is further provided with a plurality of cavities, and the cavities are located on a side of the protrusions close to the center of the main body.

[0008] The plurality of cavities and the plurality of protrusions are arranged in one-to-one correspondence, and the centers of the corresponding cavities and the centers of the corresponding protrusions are arranged in sequence along the same radial direction of the main body.

[0009] Furthermore, in two adjacent circles of protrusions, the protrusions are arranged along the axial direction of the main body and the line connecting the centers of two adjacent protrusions is parallel to the axis of the main body;

[0010] In two adjacent circles of the protrusions, the line connecting the centers of two adjacent first grooves arranged along the axial direction of the main body is parallel to the axis of the main body.

[0011] Furthermore, a reinforcing rib is provided between two adjacent cavities, the reinforcing rib is provided in one-to-one correspondence with the first groove, and the center of the reinforcing rib and the center of the corresponding first groove are provided along the same radial direction of the main body.

[0012] Furthermore, the width d1 of the first groove satisfies the relationship: 0.5 mm ≤ d1 ≤ 2 mm; and / or,

[0013] The groove depth L1 of the first groove satisfies the relationship: L1 ≥ 0.5 mm.

[0014] Furthermore, the depth L2 of the cavity satisfies the relationship: 0.8 mm ≤ L2 ≤ 2 mm; and / or,

[0015] An arc length L3 of the cavity along the circumference of the main body satisfies the relationship: 4.5 mm ≤ L3 ≤ 7 mm.

[0016] Furthermore, the radius R of the tire satisfies the relationship: 35 mm ≤ R ≤ 40 mm.

[0017] Furthermore, each circle of protrusions includes n1 protrusions, and n1 includes 24, 25, 26, 27, 28, 29 or 30.

[0018] Furthermore, an annular groove is provided on the outer circumferential surface of the main body and is located between two adjacent circles of the protrusions. The annular groove extends along the outer circumferential surface of the main body, and the first groove is communicated with the annular groove.

[0019] Furthermore, the width d2 of the annular groove satisfies the relationship: 1 mm ≤ d2 ≤ 2 mm; and / or,

[0020] The depth L4 of the annular groove satisfies the relationship: L4 ≥ 0.5 mm.

[0021] Furthermore, the main body includes an inner ring, an outer ring and a connecting layer, the inner ring, the connecting layer and the outer ring are nested in sequence and stacked along the radial direction of the main body, the protrusion is arranged on the outer circumferential surface of the outer ring, and the cavity is opened on the connecting layer.

[0022] On the other hand, the present application also provides a tire, comprising:

[0023] A main body, wherein the outer circumferential surface of the main body is provided with at least two circles of protrusions, and the at least two circles of protrusions are spaced apart along the axial direction of the main body;

[0024] Each circle of the protrusions includes multiple protrusions, and the multiple protrusions in the same circle of the protrusions are arranged at intervals along the circumferential direction of the main body, and there is a first groove between two adjacent protrusions, wherein the width x1 of the protrusions on different circles along the circumferential direction of the main body is the same, and the length x2 of the protrusions on different circles along the axial direction of the main body is the same or different.

[0025] On the other hand, the present application provides a cleaning device, which includes the tire described above.

[0026] Compared to the prior art, the present invention provides multiple first grooves and multiple cavities on the main body, with the cavities located on the side of the protrusions closer to the center of the main body. These cavities facilitate the tire's ability to dent near the center of the main body upon contact with the ground, thereby increasing the tire's contact area with the ground and, in turn, its coefficient of sliding friction. Furthermore, two adjacent circles of protrusions protrude from the outer circumference of the main body at the same height, and the multiple cavities correspond to the multiple protrusions in a one-to-one relationship, with the centers of the corresponding cavities and protrusions positioned sequentially along the same radial direction of the main body. This means that when the tire rolls, each protrusion dents upon contact with the ground due to the cavities, resulting in a nearly uniform contact area between the tire and the ground. Therefore, when the tire is running on slippery ground, the higher sliding friction generated by the tire upon contact with the ground makes it less likely to slip on slippery surfaces. Similarly, when the tire is navigating obstacles, the higher sliding friction makes it easier for the tire to climb over them. In addition, the first groove can also play a role in drainage, thereby preventing the formation of an interface film on the tire surface when the tire passes through a wet and slippery ground, which would lead to a decrease in the sliding friction coefficient of the tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0028] Figure 1 A schematic diagram of the structure of the tire disclosed in this application;

[0029] Figure 2 A cross-sectional view of the tire disclosed in this application at a first viewing angle;

[0030] Figure 3 A cross-sectional view of the tire disclosed in this application at a second viewing angle;

[0031] Figure 4 Schematic diagram of the deformation angle of the contact surface after the tire contacts the ground;

[0032] Figure 5 This is a relationship diagram of the ratio of the contact area A1 between the tire of the present application and the ground to the contact area A0 between the tire of the existing cleaning equipment and the ground, and the ratio of the sliding friction coefficient c1 of the tire of the present application to the sliding friction coefficient c2 of the existing tire.

[0033] The above drawings include the following reference numerals:

[0034] 10. Main body; 11. Inner ring; 12. Connecting layer; 13. Outer ring; 121. Cavity; 122. Reinforcement rib; 131. Protrusion; 132. First groove; 133. Annular groove. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary, not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0038] See also Figures 1 to 5 As shown, according to an embodiment of the present application, a cleaning device is provided, which may be, for example, a cleaning robot or the like. Specifically, the cleaning device includes a tire, and the tire includes a main body 10.

[0039] Among them, the outer circumferential surface of the main body 10 is provided with at least two circles of protrusions 131, and the at least two circles of protrusions 131 are arranged at intervals along the axial direction of the main body 10; each circle of protrusions 131 includes multiple protrusions 131, and the multiple protrusions 131 in the same circle of protrusions 131 are arranged at intervals along the circumferential direction of the main body 10, and the heights of two adjacent circles of protrusions 131 protruding from the outer circumferential surface of the main body 10 are the same, and there is a first groove 132 between two adjacent protrusions 131, and the main body 10 is also provided with multiple cavities 121, and the cavity 121 is located on the side of the protrusion 131 close to the center of the main body 10; wherein, the multiple cavities 121 are arranged in one-to-one correspondence with the multiple protrusions 131, and the centers of the corresponding cavities 121 and the centers of the protrusions 131 are arranged in sequence along the same radial direction of the main body 10.

[0040] Specifically, in this embodiment, the body 10 is provided with a plurality of first grooves 132 and a plurality of cavities 121, and the cavities 121 are located on the side of the protrusions 131 closer to the center of the body. Under the action of the cavities 121, the tire is more likely to sag in a direction closer to the center of the body 10 after contact with the ground, thereby increasing the tire's contact area with the ground and, in turn, the tire's sliding friction coefficient. Furthermore, two adjacent circles of protrusions 131 protrude from the outer circumference of the body 10 at the same height, and the plurality of cavities 121 are provided in a one-to-one correspondence with the plurality of protrusions 131, with the centers of the corresponding cavities 121 and protrusions 131 being sequentially arranged along the same radial direction of the body 10. This means that when the tire rolls, each protrusion 131 will sag under the action of the cavities 121 after contact with the ground, thereby making the contact area of ​​the tire with the ground almost uniform at all locations. Therefore, when the tire runs on wet and slippery ground, due to its high sliding friction coefficient, the sliding friction generated by the tire upon contact with the ground is greater, making the tire less likely to slip on wet and slippery ground. Similarly, when the tire is climbing over an obstacle, the larger sliding friction of the tire makes it easier for the tire to climb over the obstacle. In addition, the first groove 132 can also play a role in drainage, thereby preventing the tire from forming an interface film on the tire surface when passing over wet and slippery ground, which would reduce the sliding friction coefficient of the tire.

[0041] Furthermore, in two adjacent circles of protrusions 131, the line connecting the centers of the two adjacent protrusions 131 arranged along the axial direction of the main body 10 is parallel to the axis of the main body 10; in two adjacent circles of protrusions 131, the line connecting the centers of the two adjacent first grooves 132 arranged along the axial direction of the main body 10 is parallel to the axis of the main body 10.

[0042] Specifically, in two adjacent circles of protrusions 131, the line connecting the centers of the two adjacent protrusions 131 arranged along the axial direction of the main body 10 is parallel to the axis of the main body 10; in two adjacent circles of protrusions 131, the line connecting the centers of the two adjacent first grooves 132 arranged along the axial direction of the main body 10 is parallel to the axis of the main body 10, so that after each circle of protrusions 131 or first grooves 132 contacts the ground, the deformation amount of the tire is the same, which means that when the tire rolls, the contact area with the ground can always be maintained within a fixed range, thereby avoiding the friction coefficient at a certain point on the tire being too small, causing the tire to slip when moving on wet and slippery ground.

[0043] Furthermore, a reinforcing rib 122 is provided between two adjacent cavities 121 . The reinforcing rib 122 is provided in one-to-one correspondence with the first groove 132 , and the center of the reinforcing rib 122 and the center of the corresponding first groove 132 are provided along the same radial direction of the main body.

[0044] Specifically, the centers of the reinforcing ribs 122 and the corresponding centers of the first grooves 132 are arranged along the same radial direction of the main body. This prevents the situation where, when the centers of the reinforcing ribs 122 and the centers of the protrusions 131 are coaxially arranged, the deformation of the protrusions 131 upon contact with the ground is too small due to the action of the reinforcing ribs 122, thereby reducing the contact area between the tire and the ground and ultimately resulting in excessively low sliding friction between the tire and the ground. Furthermore, in this embodiment, the number of reinforcing ribs 122 and first grooves 132 is the same. While the ribs 122 enhance the structural strength of the tire, the one-to-one correspondence between the multiple reinforcing ribs 122 and the multiple first grooves 132 ensures that the deformation of each protrusion 131 upon contact with the ground is substantially the same, thereby maintaining the sliding friction generated by each portion of the tire upon contact with the ground within a certain range.

[0045] Furthermore, the width d1 of the first groove 132 satisfies the relationship: 0.5 mm ≤ d1 ≤ 2 mm.

[0046] Specifically, the width d1 of the first groove 132 cannot be less than 0.5 mm. When d1 is too small, the drainage effect of the first groove 132 on the tire is reduced, resulting in the formation of an interface film on the tire surface, which in turn reduces the tire's sliding friction coefficient, and may ultimately cause the tire to slip when passing over slippery ground. In addition, the width d1 of the first groove 132 should not be set too large, that is, d1>2 mm. Because the width d1 of the first groove 132 is related to the sliding friction coefficient of the contact surface between the tire and the ground, when d1 is too large, the sliding friction coefficient of the tire and the ground decreases. This is because as d1 increases, the area of ​​the contact surface between the tire and the ground decreases, and the contact surface between the tire and the ground has larger grooves, which ultimately reduces the sliding friction coefficient on the tire. The value of d1 can be 0.5 mm, 0.7 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, and 2 mm.

[0047] Optionally, the groove depth L1 of the first groove 132 satisfies the relationship: L1 ≥ 0.5 mm.

[0048] In this embodiment, the depth L1 of the first groove 132 also affects the coefficient of sliding friction of the tire on wet surfaces. Specifically, when L1 is less than 0.5 mm, the depth of the first groove 132 is relatively shallow. When the tire is deformed by external forces from the ground, the bottom of the first groove 132 may contact the ground, rendering the first groove 132 incapable of drainage. This may lead to the formation of an interface film on the outer surface of the tire, ultimately reducing the coefficient of sliding friction of the tire. Preferably, L1 satisfies the relationship: L1 ≥ 1.5 mm. When L1 satisfies this relationship, the first groove 132 improves the drainage efficiency of the tire and avoids direct contact with the ground after the tire contacts the ground. Furthermore, after the tire wears to a certain extent, the first groove 132 will not disappear, thereby rendering the tire incapable of drainage.

[0049] Furthermore, the depth L2 of cavity 121 satisfies the relationship: 0.8mm≤L2≤2mm. When L2 satisfies the above relationship, the protrusions 131 on the tire have good deformation ability after contacting the ground. After being deformed by external forces, the tire can increase its contact area with the ground, ultimately increasing the tire's sliding friction coefficient. However, when L2 is less than 0.8mm, after the tire contacts the ground, some protrusions 131 on the tire will be concave, while other protrusions 131 may not be concave or may be concave to a lesser extent, resulting in a less significant increase in the contact area between the tire and the ground, which may result in a lower increase in the sliding friction coefficient of the contact area between the tire and the ground. The value of L2 should be within a certain range. When L2 is too large, that is, L2 is greater than 2mm, the structural strength of the main body 10 is too low, ultimately making the main body 10 susceptible to damage. The value of L2 can be 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, and 2mm.

[0050] Optionally, the arc length L3 of the cavity 121 along the circumference of the main body 10 satisfies the relationship: 4.5 mm ≤ L3 ≤ 7 mm.

[0051] Specifically, the arc length L3 of cavity 121 along the circumference of main body 10 also affects the degree of depression of protrusion 131 on main body 10. The larger L3, the larger the volume of cavity 121. Therefore, protrusion 131 on main body 10 is more likely to deform upon contact with the ground, thereby increasing the contact area between the ground and the outer surface of the tire. When L3 satisfies the relationship 4.5mm≤L3≤7mm, L3 is moderate in length, allowing protrusion 131 on the tire surface to deform well upon contact with the ground, thereby increasing the tire's contact area with the ground. When L3 is less than 4.5mm, the volume of cavity 121 is relatively small, potentially making it difficult for protrusion 131 to dent upon contact with the ground. When L3 is greater than 7mm, the overall volume of cavity 121 is large, reducing the structural strength of main body 10 and shortening the tire's service life. Furthermore, the tire's contact area with the ground is excessive, increasing the rolling friction coefficient between the tire and the ground, which in turn affects the tire's operating speed.

[0052] In addition, the radius R of the tire satisfies the relationship: 35 mm ≤ R ≤ 40 mm.

[0053] Specifically, since the tire in this embodiment is used in cleaning equipment, such as a cleaning station or a robot vacuum, if the tire radius R is too large, i.e., R is greater than 40mm, the overall size of the cleaning equipment will be too large, affecting the cleaning range of the cleaning equipment. In other words, the tire being too large will prevent the cleaning equipment from cleaning certain areas, such as the bottom of a sofa or seat. If R is less than 35mm, the tire will be too small, making it difficult for the tire to clear obstacles. The values ​​of R can be 35mm, 36mm, 37mm, 38mm, 39mm, and 40mm.

[0054] Furthermore, each circle of protrusions 131 includes n1 protrusions 131 , and n1 satisfies the relationship: 24≤n1≤30.

[0055] Specifically, the number n1 of protrusions 131 affects the number of first grooves 132 and the tire's contact area with the ground. When n1 is large, i.e., greater than 30, the volume occupied by protrusions 131 is large, which may reduce the width of first grooves 132, ultimately reducing the contact area between the tire and the ground and lowering the coefficient of sliding friction between the tire and the ground. When n1 is less than 24, the reduced number of protrusions 131 increases the tire's sliding friction coefficient, but also its rolling friction coefficient, thereby affecting the tire's rolling speed. Values ​​for n1 include 24, 25, 26, 27, 28, 29, and 30.

[0056] Furthermore, an annular groove 133 is provided on the outer circumference of the main body 10 and is located between two adjacent circles of protrusions 131. The annular groove 133 extends along the outer circumference of the main body 10, and the first groove 132 is connected to the annular groove 133. In this embodiment, the annular groove 133 is used to connect the two adjacent circles of protrusions 131, allowing water stains on the two adjacent circles of protrusions 131 to flow through the annular groove 133, thereby improving the drainage efficiency of the tire.

[0057] Furthermore, the width d2 of the annular groove 133 satisfies the relationship: 1 mm ≤ d2 ≤ 2 mm.

[0058] Specifically, the value of d2 should not be too small. If d2 is less than 1 mm, part of the water flow will gather in the annular groove 133 and cannot be discharged quickly, which may cause an interface film to form on the tire surface, thereby reducing the sliding friction coefficient when the tire contacts the ground. The value of d2 should not be too large either. If d2 is too large, on the one hand, it will cause the width of the first groove 132 and the protrusion 131 to be reduced, thereby affecting the sliding friction coefficient of the tire contact surface with the ground; on the other hand, if d2 is too large, it will cause the structural strength of the tire to decrease. The value of d2 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm and 1 mm. In addition, it should be noted that the width d2 of the annular groove 133 on the same tire should be greater than the width d1 of the first groove 132 to ensure drainage efficiency on the tire.

[0059] Optionally, the depth L4 of the annular groove 133 satisfies the relationship: L4 ≥ 0.5 mm.

[0060] To prevent the depth L4 of the annular groove 133 from being too low, thereby preventing two adjacent, parallel first grooves 132 from being connected, the depth L4 of the annular groove 133 should be greater than or equal to 0.5 mm. When L4 ≥ 0.5 mm, the drainage efficiency of the annular groove 133 is high, and the annular groove 133 will not directly contact the ground when the tire contacts the ground. Preferably, the depth L4 of the annular groove 133 is ≥ 1.5 mm. When L4 satisfies the above relationship, the annular groove 133 will not be worn away after a certain degree of tire wear, thereby avoiding the problem of reduced drainage capacity of the tire when the depth L4 of the annular groove 133 is too small.

[0061] Further, see Appendix Figure 1 and attached Figure 4 As shown, the main body 10 includes an inner ring 11, an outer ring 13 and a connecting layer 12. The inner ring 11, the connecting layer 12 and the outer ring 13 are nested in sequence and stacked along the radial direction of the main body 10. The protrusion 131 is arranged on the outer peripheral surface of the outer ring 13, and the cavity 121 is opened on the connecting layer 12.

[0062] Specifically, inner ring 11 is mounted on the rotating shaft of the cleaning equipment, which drives the tire. When outer ring 13 contacts the ground, it deforms under the weight of the cleaning equipment and the supporting force of the ground. Simultaneously, the cavity 121 provided in connecting layer 12 increases the deformation of outer ring 13 in contact with the ground, thereby increasing the surface roughness of outer ring 13 in contact with the ground, thus improving the cleaning equipment's anti-slip and obstacle-crossing capabilities.

[0063] On the other hand, the present application also provides another tire, which includes a main body, and the outer peripheral surface of the main body 10 is provided with at least two circles of protrusions 131, and the at least two circles of protrusions 131 are arranged at intervals along the axial direction of the main body 10; each circle of protrusions 131 includes multiple protrusions 131, and the multiple protrusions 131 in the same circle of protrusions 131 are arranged at intervals along the circumferential direction of the main body 10, and there is a first groove 132 between two adjacent protrusions 131, wherein the width x1 of the protrusions 131 on different circles along the circumferential direction of the main body 10 is the same, and the length x2 of the protrusions 131 on different circles along the axial direction of the main body 10 is the same or different.

[0064] Specifically, “the width x1 of the protrusions 131 on different circles along the circumferential direction of the main body 10 is the same” means that the width x1 of each protrusion 131 on different circles along the circumferential direction of the main body 10 is the same, and “the length x2 of the protrusions 131 on different circles along the axial direction of the main body 10 is the same or different” means that the length x2 of all protrusions 131 on the same circle along the axial direction of the main body 10 is the same, but the length x2 of all protrusions 131 on different circles along the axial direction of the main body 10 is the same or different from that of all protrusions 131 on other circles 131.

[0065] When the width x1 of the protrusions 131 along the circumference of the main body 10 is the same on different circles, and the length x2 of the protrusions 131 along the axial direction of the main body 10 is the same on different circles, the deformation of the tire in contact with the ground is almost the same at all locations, thereby ensuring a relatively uniform friction coefficient at all locations on the tire. When the width x1 of the protrusions 131 along the circumference of the main body 10 is the same on different circles, and the length x2 of the protrusions 131 along the axial direction of the main body 10 is different on different circles, for example, when the length x2 of the protrusions 131 along the axial direction of the main body 10 on the outer circle is greater than the length x2 of the protrusions 131 along the axial direction of the main body 10 on the inner circle, the friction coefficient of the protrusions 131 on the outer circle is greater than the friction coefficient of the protrusions 131 on the inner circle, thereby improving the tire's grip when turning.

[0066] On the other hand, the sliding friction coefficient of the tire of the present structure should satisfy the following relationship relative to the sliding friction coefficient of the tire used in existing cleaning equipment:

[0067] c1 / c0=p·[θ1·(R+δR)-d1] / [θ0·R-d0], and c1 / c0>1;

[0068] Wherein, c1 represents the sliding friction coefficient of the tire in this embodiment; c0 represents the sliding friction coefficient of the tire used in the existing cleaning equipment; p is a dependent variable factor, which is related to the roughness of the tire, temperature and humidity, the material of the tire, the material of the contact surface, and the roughness between the two contact surfaces, and p satisfies the relationship: 0<p<1; as shown in the attached figure Figure 4 As shown, attached Figure 4 Middle θ x It can be expressed as θ1 or θ0, θ1 represents the angle between the two ends of the contact surface length L5 between the tire and the ground and the center of the main body 10 in this embodiment, θ0 represents the angle between the two ends of the contact surface length L5 between the existing tire and the ground and the center of the main body 10, δR is the difference between the deformation of the tire after contact with the ground using the structure of the present application and the maximum deformation of the tire after contact with the ground in the prior art, d0 represents the width of the first groove 132 in the existing tire, and d1 is the width of the first groove 132 in the tire of the present application.

[0069] Typically, the value of θ0 satisfies the relationship: 0.279 rad ≤ θ0 ≤ 0.349 rad, and the overall weight G of the cleaning equipment satisfies the relationship: 3.5 kg ≤ G ≤ 6.5 kg. Furthermore, in this embodiment, θ1 can be calculated using the following formula: θ1 = 4π / n1 - d1 / R. A larger θ1 indicates a greater deformation of the tire's contact surface with the ground.

[0070] In a specific embodiment, the radius R of the tire is 35 mm. After testing, the value of δR is 0.6 mm, the value of θ0 is 0.325 rad, the value of d0 is 3.5 mm, the value of θ1 is 0.384 rad, the value of d1 is 1.6 mm, and the value of n1 is 30. At this time, the value range of p is greater than or equal to 0.7 and less than or equal to 0.85. It can be calculated that c1 / c0 is 1.53p, so c1 / c0>1. It can be seen that the friction force of this embodiment is improved compared with the tire of the prior art. In another specific embodiment, the radius R of the tire is 35 mm. After testing, the value of δR is 0.6 mm, the value of θ0 is 0.325 rad, the value of d0 is 3.5 mm, the value of θ1 is 0.425 rad, the value of d1 is 1.6 mm, and the value of n1 is 30. At this time, the value range of p is greater than or equal to 0.75 and less than or equal to 0.9. It can be calculated that c1 / c0 is 1.74p. Obviously, c1 / c0>1.

[0071] In addition, to verify the correctness of the above formula, i.e., c1 / c0≥1, this embodiment fits the relationship between the contact area A0 of the existing tire and the ground, the contact area A1 of the tire of the present application and the ground, the sliding friction coefficient c0 of the existing tire, and the sliding friction coefficient c1 of the tire of the present application. The fitting results are shown in the attached figure. Figure 5 visible, Figure 5 The horizontal coordinate A1 / A0 represents the ratio between the contact surface A1 of the tire of the present application and the ground and the contact surface A0 of the existing tire and the ground, where A1 / A0 corresponds to [θ1·(R+δR)-d1] / [θ0·R-d0] in the above formula, and the vertical coordinate c1 / c0 represents the ratio between the sliding friction coefficient c1 of the tire of the present application and the sliding friction coefficient c0 of the existing tire, and c1 / c0 corresponds to the [θ1·(R+δR)-d1] / [θ0·R-d0]·p part in the above formula. Figure 5The center line A is the baseline, that is, the relationship between c1 and c0 when p=1. Line B corresponds to the change curve of c1 / c0 and A1 / A0 when the existing tire's contact area with the ground A0 is at its maximum value. It can be seen that c1 / c0 is always greater than or equal to 1, and the p value is always less than 1. In addition, it can be seen that the contact area between the tire of the present application and the ground continues to increase, and the p value increases with the increase of A1 / A0, but the rate of increase of the p value is getting smaller and smaller, and eventually tends to a fixed value; and line C is the change curve of c1 / c0 and A1 / A0 when the existing tire's contact area with the ground A0 is at its minimum value. Similarly, the p value increases with the increase of A1 / A0, but after increasing to a certain extent, it tends to be stable, and p<1. At the same time, Figure 5 The ratio of c1 / c0 along center lines B and C is always greater than 1, indicating that the structural improvements of this application can effectively improve the sliding friction coefficient of the tire. In practice, the relationship between c1 / c0 and A1 / A0 lies between lines B and C. Furthermore, when other factors remain unchanged, c1 / c0 increases with increasing contact area ratio A1 / A0, but the increase becomes increasingly gradual.

[0072] In summary, the present application has at least the following beneficial technical effects: Multiple cavities 121 are defined in the main body 10, with cavities 121 located on the side of the protrusions 131 near the center of the main body. This allows the cleaning device's tire to deform more easily upon contact with the ground, thereby increasing the tire's contact area with the ground and, in turn, increasing the sliding friction coefficient between the tire and the ground, ultimately improving the tire's ability to overcome obstacles and maneuver on slippery surfaces. Furthermore, the present application specifies the width d1 of the first grooves 132 in the tire, the number n1 of protrusions 131 around the tire's outer circumference, and the tire's radius R, thereby increasing the tire's contact area with the ground and, ultimately, enhancing the tire's sliding friction.

[0073] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0074] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0075] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A tire, characterized in that: include: A main body (10), wherein the outer peripheral surface of the main body (10) is provided with at least two circles of protrusions (131), and the at least two circles of protrusions (131) are spaced apart along the axial direction of the main body (10); Each circle of the protrusions (131) includes a plurality of the protrusions (131), and the plurality of the protrusions (131) in the same circle of the protrusions (131) are spaced apart along the circumferential direction of the main body (10), and the heights of the protrusions (131) of two adjacent circles protruding from the outer circumferential surface of the main body (10) are the same, and a first groove (132) is provided between two adjacent protrusions (131), and the main body (10) is further provided with a plurality of cavities (121), and the cavities (121) are located on a side of the protrusions (131) close to the center of the main body (10); The plurality of cavities (121) and the plurality of protrusions (131) are arranged in one-to-one correspondence, and the centers of the corresponding cavities (121) and the centers of the protrusions (131) are arranged in sequence along the same radial direction of the main body (10).

2. The tire according to claim 1, wherein In two adjacent circles of the protrusions (131), the protrusions (131) are arranged along the axial direction of the main body (10), and the line connecting the centers of the two adjacent protrusions (131) is parallel to the axis of the main body (10); In two adjacent circles of the protrusions (131), a line connecting the centers of two adjacent first grooves (132) arranged along the axial direction of the main body (10) is parallel to the axis of the main body (10).

3. The tire according to claim 1, wherein: A reinforcing rib (122) is provided between two adjacent cavities (121), the reinforcing rib (122) and the first groove (132) are provided in one-to-one correspondence, and the center of the reinforcing rib (122) and the center of the corresponding first groove (132) are provided along the same radial direction of the main body.

4. The tire according to claim 1, wherein The width d1 of the first groove (132) satisfies the relationship: 0.5 mm ≤ d1 ≤ 2 mm; and / or, The groove depth L1 of the first groove (132) satisfies the relationship: L1≥0.5mm.

5. The tire according to claim 1, wherein The depth L2 of the cavity (121) satisfies the relationship: 0.8 mm ≤ L2 ≤ 2 mm; and / or, The arc length L3 of the cavity (121) along the circumference of the main body (10) satisfies the relationship: 4.5 mm ≤ L3 ≤ 7 mm.

6. The tire according to claim 1, wherein The radius R of the tire satisfies the relationship: 35 mm ≤ R ≤ 40 mm.

7. The tire according to claim 1, wherein Each circle of protrusions (131) includes n1 protrusions (131), and n1 includes 24, 25, 26, 27, 28, 29 or 30.

8. The tire according to any one of claims 1 to 7, characterized in that An annular groove (133) is provided on the outer circumferential surface of the main body (10) and is located between two adjacent circles of the protrusions (131); the annular groove (133) extends along the outer circumferential surface of the main body (10), and the first groove (132) is communicated with the annular groove (133).

9. The tire according to claim 8, characterized in that The width d2 of the annular groove (133) satisfies the relationship: 1mm≤d2≤2mm; and / or, The depth L4 of the annular groove (133) satisfies the relationship: L4≥0.5mm.

10. The tire according to any one of claims 1 to 7, characterized in that The main body (10) includes an inner ring (11), an outer ring (13) and a connecting layer (12); the inner ring (11), the connecting layer (12) and the outer ring (13) are nested in sequence and stacked along the radial direction of the main body (10); the protrusion (131) is arranged on the outer peripheral surface of the outer ring (13); and the cavity (121) is opened on the connecting layer (12).

11. A tire, characterized in that: include: A main body (10), wherein the outer peripheral surface of the main body (10) is provided with at least two circles of protrusions (131), and the at least two circles of protrusions (131) are spaced apart along the axial direction of the main body (10); Each circle of the protrusions (131) includes a plurality of the protrusions (131), and the plurality of the protrusions (131) in the same circle of the protrusions (131) are spaced apart along the circumferential direction of the main body (10), and a first groove (132) is provided between two adjacent protrusions (131), wherein the width x1 of the protrusions (131) on different circles along the circumferential direction of the main body (10) is the same, and the length x2 of the protrusions (131) on different circles along the axial direction of the main body (10) is the same or different.

12. A cleaning device, characterized in that: The cleaning device comprises a tire according to any one of claims 1 to 11.

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