Driving wheel and sweeper

Abstract

The application provides a driving wheel and a sweeper. The driving wheel comprises a tire, a tire body, a first bead and a second bead. The first bead and the second bead are arranged around the outer periphery of the tire body, and the first bead and the second bead are arranged at intervals along the axial direction of the tire body. The top of the first bead and the top of the second bead are each provided with a plurality of first patterns which are arranged at intervals along the circumferential direction of the tire body. The first pattern comprises a first section and a second section which are connected to each other. The first section and the second section are inclined to each other. The distance between the first section and the second section of the first bead gradually increases along a first direction. The distance between the second section and the second section of the second bead gradually increases along a second direction. The first direction and the second direction are parallel to the circumferential direction of the tire body, and the first direction and the second direction are opposite to each other. Through the arrangement, the friction between the tire and the ground is increased, the motion stability of the driving wheel when advancing and retreating is considered, and the vibration and abnormal sound of the sweeper when walking are reduced.

Description

Technical Field

[0001] This application relates to the field of sweeping machine technology, and in particular to a drive wheel and a sweeping machine. Background Technology

[0002] With the continuous improvement of technology, home appliances such as robot vacuum cleaners have gradually appeared on the market, freeing users from housework.

[0003] Sweeping robots typically use drive wheels and rollers for movement and obstacle crossing. Currently, the drive wheels of sweeping robots generally use a rectangular block design with small tread patterns. This design results in discontinuous tread patterns, which makes the tires prone to impacts when moving. The vibration of the drive wheels is also transmitted to the machine body, causing vibration and abnormal noise in the machine body. Utility Model Content

[0004] In view of this, this application provides a drive wheel and a sweeper to reduce vibration and abnormal noise when the sweeper is moving.

[0005] Specifically, the following technical solutions are included:

[0006] In a first aspect, this application provides a drive wheel, the drive wheel comprising:

[0007] The tire includes a tire body, a first tire bead, and a second tire bead, wherein the first tire bead and the second tire bead are both disposed around the outer periphery of the tire body, and the first tire bead and the second tire bead are spaced apart along the axial direction of the tire body;

[0008] The top of both the first and second beads is provided with a plurality of first patterns that are spaced apart along the circumference of the tire body. The first pattern includes a first segment and a second segment that are connected. The first segment and the second segment are inclined to each other. The distance between the first segment and the second segment of the first bead gradually increases along a first direction. The distance between the second segment and the second segment of the second bead gradually increases along a second direction. The first direction and the second direction are both parallel to the circumference of the tire body and are opposite to each other.

[0009] In the technical solution of this application, by setting a gap between the first and second tire bead, the tire's deformation capacity is improved, reducing bumps and impacts when the drive wheel is moving. By setting the first and second sections to be connected at an angle, the first tread pattern can continuously contact the ground, thereby providing the tire with good guidance and grip, increasing the friction between the tire and the ground, reducing slippage, and reducing the impact and noise when the drive wheel contacts the ground. By setting the first tread pattern of the first tire bead and the second tread pattern of the second tire bead to be opposite directions, the stability of the drive wheel's movement when moving forward and backward is taken into account, further improving the drive wheel's grip and helping to reduce vibration and abnormal noise when the sweeper is moving.

[0010] In one possible implementation, both the first bead and the second bead include a plurality of first protrusions, which are spaced apart circumferentially along the tire body. The first protrusions protrude radially outward relative to the outer peripheral wall of the tire body, and each first protrusion is provided with a plurality of first patterns on its top.

[0011] In the technical solution of this application, the first protrusions are distributed circumferentially along the tire body. The gap between adjacent first protrusions improves the tire's deformation capacity, which is beneficial to improving the tire's elasticity and shock absorption capacity, and reducing bumps and impacts when the drive wheels are running.

[0012] In one possible implementation, the first protrusion of the first bead and the first protrusion of the second bead are offset in the axial direction of the tire body.

[0013] In the technical solution of this application, the staggered complementary design of the first protrusion of the first tire bead and the first protrusion of the second tire bead ensures that the tire is always in stable contact with the ground, and avoids the sweeper as a whole from having large bumps and impacts due to the first protrusion of the first tire bead and the first protrusion of the second tire bead being lifted off the ground at the same time. This helps to reduce the vibration amplitude of the sweeper and improve the stability of walking.

[0014] In one possible implementation, the first bead and the second bead further include a plurality of second protrusions spaced apart circumferentially along the tire body, each second protrusion being located between two adjacent first protrusions, and the top of the second protrusion being provided with a second pattern, the second pattern being periodically undulating in the circumferential direction of the tire body.

[0015] In the technical solution of this application, since the second tread pattern is a periodic concave-convex structure, the contact area between the second tread pattern and the ground increases during the rolling and walking of the tire, the pressure distribution on the tire is more uniform, the vibration and impact during walking are reduced, and the tire's grip and walking stability are improved.

[0016] In one possible implementation, the second pattern includes a plurality of first inclined surfaces and a plurality of second inclined surfaces, the first inclined surfaces and the second inclined surfaces being alternately distributed along the circumference of the tire body and inclined to each other, so that the cross-section of the second pattern is serrated.

[0017] In the technical solution of this application, the inclined design of the first and second inclined surfaces can better guide the deformation of the second tread pattern during contact with the ground, thereby improving the tire's elastic cushioning capacity. At the same time, since the first and second inclined surfaces are alternately distributed along the circumference of the tire body, the continuity of the second tread pattern in contact with the ground can be ensured, avoiding vibration or bumps caused by discontinuous tread patterns, which is beneficial to reducing noise and improving walking stability.

[0018] In one possible implementation, the distance between the top surface of the second tread pattern and the central axis of the tire body is less than the distance between the top surface of the first tread pattern and the central axis of the tire body.

[0019] In the technical solution of this application, when the drive wheel travels to areas with height differences such as thresholds and carpet edges, it can utilize the uneven design of the first and second patterns to better engage the edges of obstacles and overcome them, avoiding slippage or friction during overtaking, thus improving the obstacle-crossing ability of the sweeper and enhancing its walking stability.

[0020] In one possible implementation, the width of the first protrusion in the circumferential direction of the tire body is D1, and the width of the second protrusion in the circumferential direction of the tire body is D2, wherein D2 is 1 / 5 to 1 / 3 of D1.

[0021] In the technical solution of this application, the contact area between the first protrusion and the second protrusion and the ground is better allocated, balancing the manufacturing difficulty and the vibration reduction and noise reduction effect. On the one hand, it avoids the manufacturing difficulty from being too narrow when D2 is less than 1 / 5D1. On the other hand, it avoids the significant bumps and vibrations caused by the excessive width when D2 is greater than 1 / 3D1, which would affect the walking stability of the sweeper.

[0022] In one possible implementation, the distance between two adjacent first protrusions in the circumferential direction of the tire body is less than 2 / 5D1.

[0023] In the technical solution of this application, the gap between two adjacent first protrusions is relatively narrow. On the one hand, the gap enhances the flexibility and deformation capability of the tire to adapt to uneven ground and reduce impact and noise. On the other hand, it prevents the gap between two adjacent first protrusions from being too large, thus avoiding significant bumps and vibrations during the alternating contact between the first and second protrusions and the ground, which would affect the walking stability of the sweeper.

[0024] In one possible implementation, the tire is provided with a plurality of shock-absorbing holes, which are spaced apart circumferentially along the tire body, and at least a portion of the shock-absorbing holes penetrates the first bead or the second bead along the axial direction of the tire body.

[0025] In the technical solution of this application, by setting shock-absorbing holes, the weight of the tire is reduced, the deformation capacity of the tire is enhanced, and the vibration brought by the ground during the tire's movement is also reduced, thereby improving the tire's vibration reduction and noise reduction capabilities.

[0026] In one possible implementation, the shock-absorbing hole includes a first hollow portion and a second hollow portion that are interconnected. The first hollow portion extends circumferentially along the tire body, and the second hollow portion is located at one end of the first hollow portion and extends radially along the tire body. The second hollow portion is closer to the central region of the first protrusion than the first hollow portion.

[0027] In the technical solution of this application, the second hollow part can improve the deformation capability of the first protrusion with a higher height. When the first protrusion comes into contact with the ground, the first protrusion can undergo radial deformation. The second hollow part is used to quickly attenuate the impact energy and reduce the vibration of the tire.

[0028] In one possible implementation, each of the first protrusions is provided with two shock-absorbing holes, which are symmetrically distributed about a symmetrical plane, which is parallel to the axial and radial directions of the tire body, respectively.

[0029] In the technical solution of this application, the two shock-absorbing holes are distributed in a mirror-symmetrical manner, which can ensure the stress balance on both sides of the first protrusion during compression deformation, improve the deformation uniformity of the first protrusion, and enhance the structural stability of the first protrusion and the walking stability of the tire.

[0030] In one possible implementation, the drive wheel further includes an axle, a base, and a cover, the base and the cover being located on opposite axial sides of the tire, and the base, the cover, and the tire being interconnected and coaxially fitted onto the axle.

[0031] In the technical solution of this application, the cover and the base serve to connect the axle and the tire and support the tire.

[0032] Secondly, this application provides a sweeping machine, which includes the drive wheel provided in any embodiment of the first aspect. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 An exploded view of the drive wheel provided in an embodiment of this application;

[0035] Figure 2 A side view of the drive wheel provided in an embodiment of this application;

[0036] Figure 3 This is a schematic diagram of the drive wheel provided in an embodiment of this application;

[0037] Figure 4 A front view of the drive wheel provided in an embodiment of this application;

[0038] Figure 5 One of the partial structural schematic diagrams of the drive wheel provided in the embodiments of this application;

[0039] Figure 6 This is a second partial structural schematic diagram of the drive wheel provided in an embodiment of this application.

[0040] The reference numerals in the figure indicate:

[0041] 1-Drive wheel; 11-Tire; 111-Tire body; 112-First tire bead; 1121-First protrusion; 1122-First tread pattern; 11221-First section; 11222-Second section; 1123-Second protrusion; 11231-Second tread pattern; 11231a-First slope; 11231b-Second slope; 113-Second tire bead; 114-Shock absorption hole; 1141-First hollow part; 1142-Second hollow part; 12-Base; 13-Pressure cap; 14-Wheel axle; 15-Connecting bolt.

[0042] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] The directional terms used in the embodiments of this application, such as "up," "down," and "side," are generally based on the relative relationships shown in the figures. These directional terms are used merely to more clearly describe the relationships between structures, not to describe absolute directions. When the product is placed in different orientations, the orientation may change; for example, "up" and "down" may be interchanged.

[0045] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art.

[0046] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0047] With the continuous improvement of technology, home appliances such as robot vacuum cleaners have gradually appeared on the market, freeing users from housework.

[0048] Sweeping robots typically use drive wheels and rollers for movement and obstacle crossing. Currently, the drive wheels of sweeping robots generally use a rectangular block design with small tread patterns. This design results in discontinuous tread patterns, which makes the tires prone to impacts when moving. The vibration of the drive wheels is also transmitted to the machine body, causing vibration and abnormal noise in the machine body.

[0049] To address the aforementioned technical problems, this application provides a drive wheel and a sweeper to reduce vibration and abnormal noise during sweeper operation.

[0050] like Figures 1 to 4 As shown, the drive wheel 1 includes a tire 11, which includes a tire body 111, a first tire bead 112 and a second tire bead 113. The first tire bead 112 and the second tire bead 113 are both arranged around the outer periphery of the tire body 111, and the first tire bead 112 and the second tire bead 113 are spaced apart along the axial direction of the tire body 111.

[0051] like Figure 2 and Figure 5As shown, the top of the first bead 112 and the second bead 113 are each provided with a plurality of first patterns 1122 distributed circumferentially along the tire body 111. The first pattern 1122 includes a first segment 11221 and a second segment 11222 connected to each other. The first segment 11221 and the second segment 11222 are inclined to each other. The distance between the first segment 11221 and the second segment 11222 of the first bead 112 gradually increases along the first direction R1. The distance between the second segment 11222 and the second segment 11222 of the second bead 113 gradually increases along the second direction R2. The first direction R1 and the second direction R2 are both parallel to the circumference of the tire body 111, and the first direction R1 and the second direction R2 are opposite. For example, when the first direction R1 is clockwise, the second direction R2 is counterclockwise.

[0052] The tire carcass 111 is circular. The first bead 112 and the second bead 113 are both located on the outer wall of the tire carcass 111. The tops of the first bead 112 and the second bead 113 are on the side furthest from the central axis of the tire carcass 111. The first tread pattern 1122 is used for contact with surfaces such as the ground. A gap exists between the first bead 112 and the second bead 113, which helps improve the deformation capacity of the tire 11, enhances its elasticity and shock absorption capacity, and reduces bumps and impacts when the drive wheel 1 is in motion.

[0053] like Figure 5 As shown, the first segment 11221 and the second segment 11222 are both straight lines. One end of the first segment 11221 and the second segment 11222 intersects, so that the first pattern 1122 is "V" shaped. The "V" shaped pattern design can make continuous contact with the ground, thereby providing the tire 11 with good guidance and grip, increasing the friction between the tire 11 and the ground, reducing the occurrence of slippage, and reducing the impact noise when the drive wheel 1 contacts the ground.

[0054] like Figure 2 and Figure 5 As shown, since the distance between the first segment 11221 and the second segment 11222 of the first bead 112 gradually increases along the first direction R1, and the distance between the second segment 11222 and the second segment 11222 of the second bead 113 gradually increases along the second direction R2, and the first direction R1 and the second direction are opposite, the "V"-shaped tip of the first pattern 1122 of the first bead 112 points to the second direction R2, and the "V"-shaped tip of the first pattern 1122 of the second bead 113 points to the first direction R1.

[0055] Optionally, the connection between the first segment 11221 and the second segment 11222 can be arc-shaped, so that the first pattern 1122 has a U-shaped structure.

[0056] Optionally, in each first pattern 1122, there may be multiple first segments 11221 and / or second segments 11222. The first segments 11221 and second segments 11222 are alternately distributed along the axial direction of the tire body 111, so that the first pattern 1122 presents a shape similar to "N" or "W".

[0057] Optionally, such as Figure 1 As shown, the drive wheel 1 also includes an axle 14, a base 12, and a cover 13. The base 12 and the cover 13 are located on the axial sides of the tire 11, respectively. The base 12, the cover 13, and the tire 11 are connected to each other and coaxially sleeved on the axle 14.

[0058] like Figure 1 As shown, the drive wheel 1 also includes a connecting bolt 15, which passes through the cover 13, the tire 11 and the base 12 in sequence, connecting the cover 13, the tire 11 and the base 12 together.

[0059] For example, the pressure cap 13 and the base 12 are made of plastic and serve to connect the axle 14 and the tire 11 and support the tire 11.

[0060] In this embodiment, by setting a gap between the first bead 112 and the second bead 113, the deformation capacity of the tire 11 is improved, and the bumps and impacts when the drive wheel 1 moves are reduced. By setting the first segment 11221 and the second segment 11222 to be inclinedly connected, the first tread pattern 1122 can continuously contact the ground, thereby providing the tire 11 with good guidance and grip, increasing the friction between the tire 11 and the ground, reducing the occurrence of slippage, and reducing the impact and noise when the drive wheel 1 contacts the ground. By setting the first tread pattern 1122 of the first bead 112 and the second tread pattern 11231 of the second bead 113 to be opposite in direction, the motion stability of the drive wheel 1 when moving forward and backward is taken into account, further improving the grip of the drive wheel 1, and helping to reduce the vibration and abnormal noise when the sweeper moves.

[0061] In some embodiments, the first bead 112 and the second bead 113 each include a plurality of first protrusions 1121, which are distributed circumferentially along the tire body 111. The first protrusions 1121 protrude radially outward relative to the outer peripheral wall of the tire body 111, and each first protrusion 1121 is provided with a plurality of first patterns 1122 on its top.

[0062] like Figure 2 , Figure 3 and Figure 5 As shown, the first protrusion 1121 is in the shape of a rectangular protrusion, and the top of each first protrusion 1121 has three spaced first patterns 1122.

[0063] In this embodiment, by setting multiple first protrusions 1121 distributed circumferentially along the tire body 111, the deformation capability of the tire 11 is improved by utilizing the gap between adjacent first protrusions 1121, which is beneficial to improving the elasticity and shock absorption capability of the tire 11 and reducing the bumps and impacts when the drive wheel 1 is traveling.

[0064] In some embodiments, the first protrusion 1121 of the first bead 112 and the first protrusion 1121 of the second bead 113 are misaligned in the axial direction of the tire body 111.

[0065] like Figure 2 As shown, the horizontal direction is the axial direction of the tire body 111. The first protrusion 1121 of the first bead 112 and the first protrusion 1121 of the second bead 113 are not aligned one by one, but are arranged in a staggered manner.

[0066] This design, utilizing the staggered and complementary design of the first protrusion 1121 of the first tire bead 112 and the first protrusion 1121 of the second tire bead 113, ensures that the tire 11 is always in stable contact with the ground. This avoids the sweeper from experiencing large bumps and impacts due to the first protrusion 1121 of the first tire bead 112 and the first protrusion 1121 of the second tire bead 113 simultaneously leaving the ground, thus reducing the vibration amplitude of the sweeper and improving its stability.

[0067] In some embodiments, such as Figure 2 , Figure 3 and Figure 6 As shown, the first bead 112 and the second bead 113 also include a plurality of second protrusions 1123 distributed circumferentially along the tire body 111. Each second protrusion 1123 is located between two adjacent first protrusions 1121. The top of the second protrusion 1123 is provided with a second pattern 11231, and the second pattern 11231 is periodically undulating in the circumferential direction of the tire body 111.

[0068] The second protrusion 1123 serves as an auxiliary support unit, providing transitional support between two adjacent first protrusions 1121.

[0069] The second tread pattern 11231 can be wavy, serrated, or similar. Since the second tread pattern 11231 has a periodic undulating structure, the contact area between the second tread pattern 11231 and the ground increases during the rolling process of the tire 11, and the pressure distribution on the tire 11 is more uniform, reducing vibration and impact during walking, which helps to improve the grip and walking stability of the tire 11.

[0070] Optionally, the second pattern 11231 includes a plurality of first inclined surfaces 11231a and a plurality of second inclined surfaces 11231b, the first inclined surfaces 11231a and the second inclined surfaces 11231b being alternately distributed along the circumference of the tire body 111 and inclined to each other, so that the cross-section of the second pattern 11231 is serrated.

[0071] For example Figure 6 As shown, the first inclined surface 11231a and the second inclined surface 11231b intersect to form multiple triangular protrusions, so that the second pattern 11231 is in a continuous serrated shape.

[0072] In this embodiment, the inclined design of the first inclined surface 11231a and the second inclined surface 11231b can better guide the deformation of the second tread pattern 11231 during contact with the ground, thereby improving the elastic cushioning capacity of the tire 11. At the same time, since the first inclined surface 11231a and the second inclined surface 11231b are alternately distributed along the circumference of the tire body 111, the continuity of the second tread pattern 11231 in contact with the ground can be ensured, avoiding vibration or bumps caused by discontinuous tread patterns, which is beneficial to reducing noise and improving walking stability.

[0073] In some embodiments, the distance between the top surface of the second pattern 11231 and the central axis of the tire body 111 is less than the distance between the top surface of the first pattern 1122 and the central axis of the tire body 111.

[0074] like Figure 4 As shown, the height of the first protrusion 1121 is greater than the height of the second protrusion 1123, and the height of the second pattern 11231 is less than the height of the first pattern 1122, thus forming a design of undulating first pattern 1122 and second pattern 11231 on a macroscopic scale.

[0075] With this setting, when the drive wheel 1 travels to areas with height differences such as thresholds and carpet edges, it can better engage with the edges of obstacles and overcome obstacles by utilizing the uneven design of the first pattern 1122 and the second pattern 11231, avoiding slippage or friction during overcoming, thus improving the obstacle-crossing ability of the sweeper and enhancing its walking stability.

[0076] In some embodiments, the width of the first protrusion 1121 in the circumferential direction of the tire body 111 is D1, and the width of the second protrusion 1123 in the circumferential direction of the tire body 111 is D2, wherein D2 is 1 / 5 to 1 / 3 of D1.

[0077] For example, the ratio of D2 to D1 can be 1 / 5, 1 / 4, 1 / 3, etc.

[0078] This design better allocates the contact area between the first protrusion 1121 and the second protrusion 1123 and the ground, balancing the manufacturing difficulty and the vibration reduction and noise reduction effect. On the one hand, it avoids increasing the manufacturing difficulty due to the narrow width when D2 is less than 1 / 5D1. On the other hand, it avoids the significant bumps and vibrations that occur when walking due to the excessive width when D2 is greater than 1 / 3D1, which would affect the walking stability of the sweeper.

[0079] In some embodiments, the distance between two adjacent first protrusions 1121 in the circumferential direction of the tire body 111 is less than 2 / 5D1.

[0080] With this design, the gap between two adjacent first protrusions 1121 is relatively narrow. On the one hand, the gap enhances the flexibility and deformation capability of the tire 11 to adapt to uneven ground and reduce impact and noise. On the other hand, it prevents the gap between two adjacent first protrusions 1121 from being too large, thus avoiding significant bumps and vibrations during the alternating contact between the first protrusion 1121 and the second protrusion 1123 and the ground, which would affect the walking stability of the sweeper.

[0081] In some embodiments, the tire 11 is provided with a plurality of shock-absorbing holes 114, which are spaced apart circumferentially along the tire body 111, and at least a portion of the shock-absorbing holes 114 penetrates through the first bead 112 or the second bead 113 along the axial direction of the tire body 111.

[0082] like Figure 5 As shown, a portion of the shock-absorbing hole 114 is provided through the tire body 111, and another portion is provided through the first protrusion 1121 of the first tire bead 112 or the second tire bead 113. Since the first protrusion 1121 has a large height in the radial direction of the tire body 111, the shock-absorbing hole 114 can enhance the flexibility and deformation capacity of the first protrusion 1121 to adapt to uneven ground and reduce impact and noise.

[0083] By setting the shock-absorbing holes 114, the weight of the tire 11 is reduced, the deformation capacity of the tire 11 is enhanced, and it is also beneficial to attenuate the vibration brought by the ground during the tire 11's movement, thereby improving the tire 11's vibration reduction and noise reduction capabilities.

[0084] The shock-absorbing hole 114 can be circular, elliptical, or elongated.

[0085] In some embodiments, such as Figure 5 As shown, the shock-absorbing hole 114 includes a first hollow portion 1141 and a second hollow portion 1142 that are interconnected. The first hollow portion 1141 extends circumferentially along the tire body 111, and the second hollow portion 1142 is located at one end of the first hollow portion 1141 and extends radially along the tire body 111. The second hollow portion 1142 is closer to the middle region of the first protrusion 1121 than the first hollow portion 1141.

[0086] like Figure 5 As shown, the shock-absorbing hole 114 is roughly L-shaped, and its position roughly corresponds to the position of the first protrusion 1121. The first hollowed-out portion 1141 is closer to the edge region of the first protrusion 1121 than the second hollowed-out portion 1142. It should be noted that the edge region of the first protrusion 1121 refers to the two side edge regions of the first protrusion 1121 on the circumferential direction of the tire body 111, and the central region of the first protrusion 1121 is the region near the center of the first protrusion 1121 on the circumferential direction of the tire body 111. The central region is located between the two edge regions.

[0087] Since the second hollow portion 1142 extends radially along the tire body 111 and is closer to the central region of the first protrusion 1121, the second hollow portion 1142 can improve the deformation capability of the first protrusion 1121, which is higher in height. When the first protrusion 1121 contacts the ground, the first protrusion 1121 can undergo radial deformation. The second hollow portion 1142 can quickly attenuate the impact energy and reduce the vibration of the tire 11.

[0088] Meanwhile, the first hollow portion 1141 is closer to the gap between the adjacent first protrusions 1121 than the second hollow portion 1142. By setting the first hollow portion 1141 to extend circumferentially along the tire body 111, it is possible to avoid the edge area of ​​the first protrusion 1121 from being excessively deformed and causing bumps during travel.

[0089] In some embodiments, each first protrusion 1121 is provided with two shock-absorbing holes 114, which are symmetrically distributed about a symmetrical plane, which is parallel to the axial and radial directions of the tire body 111, respectively.

[0090] As shown in Figure 5, two shock-absorbing holes 114 are mirror-symmetrically distributed at each first protrusion 1121, which can ensure the stress balance on both sides of the first protrusion 1121 during compression deformation, improve the deformation uniformity of the first protrusion 1121, and enhance the structural stability of the first protrusion 1121 and the walking stability of the tire 11.

[0091] This application also provides a sweeping machine, which includes the drive wheel 1 provided in any of the above embodiments.

[0092] The sweeper provided in this application includes the drive wheel 1 provided in any of the above embodiments, and therefore has the beneficial effects of the drive wheel 1 provided in any of the above embodiments, which will not be repeated here.

[0093] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0094] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0095] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A drive wheel, characterized in that, The drive wheel includes: The tire (11) includes a tire body (111), a first bead (112) and a second bead (113), wherein the first bead (112) and the second bead (113) are both arranged around the outer periphery of the tire body (111), and the first bead (112) and the second bead (113) are spaced apart along the axial direction of the tire body (111); The top of both the first bead (112) and the second bead (113) is provided with a plurality of first patterns (1122) distributed at intervals along the circumference of the tire body (111). The first pattern (1122) includes a first segment (11221) and a second segment (11222) connected together. The first segment (11221) and the second segment (11222) are inclined to each other. The distance between the first segment (11221) and the second segment (11222) of the first bead (112) gradually increases along a first direction (R1). The distance between the second segment (11222) and the second segment (11222) of the second bead (113) gradually increases along a second direction (R2). The first direction (R1) and the second direction (R2) are both parallel to the circumference of the tire body (111), and the first direction (R1) and the second direction (R2) are opposite.

2. The drive wheel according to claim 1, characterized in that, Both the first bead (112) and the second bead (113) include a plurality of first protrusions (1121), which are distributed circumferentially along the tire body (111). The first protrusions (1121) protrude radially outward relative to the outer peripheral wall of the tire body (111), and each first protrusion (1121) is provided with a plurality of first patterns (1122) on its top.

3. The drive wheel according to claim 2, characterized in that, The first protrusion (1121) of the first bead (112) and the first protrusion (1121) of the second bead (113) are misaligned in the axial direction of the tire body (111).

4. The drive wheel according to claim 2, characterized in that, The first bead (112) and the second bead (113) further include a plurality of second protrusions (1123) spaced apart circumferentially along the tire body (111), each second protrusion (1123) being located between two adjacent first protrusions (1121), and the top of the second protrusion (1123) being provided with a second pattern (11231), the second pattern (11231) being periodically undulating in the circumferential direction of the tire body (111).

5. The drive wheel according to claim 4, characterized in that, The second pattern (11231) includes a plurality of first inclined surfaces (11231a) and a plurality of second inclined surfaces (11231b), the first inclined surfaces (11231a) and the second inclined surfaces (11231b) being alternately distributed along the circumference of the tire body (111) and inclined to each other, so that the cross-section of the second pattern (11231) is serrated.

6. The drive wheel according to claim 4, characterized in that, The distance between the top surface of the second pattern (11231) and the central axis of the tire body (111) is less than the distance between the top surface of the first pattern (1122) and the central axis of the tire body (111).

7. The drive wheel according to claim 6, characterized in that, The width of the first protrusion (1121) in the circumferential direction of the tire body (111) is D1, and the width of the second protrusion (1123) in the circumferential direction of the tire body (111) is D2, wherein D2 is 1 / 5 to 1 / 3 of D1.

8. The drive wheel according to claim 7, characterized in that, The distance between two adjacent first protrusions (1121) in the circumferential direction of the tire body (111) is less than 2 / 5D1.

9. The drive wheel according to any one of claims 2 to 8, characterized in that, The tire (11) is provided with a plurality of shock-absorbing holes (114), which are spaced apart circumferentially along the tire body (111). At least a portion of the shock-absorbing holes (114) penetrates the first bead (112) or the second bead (113) along the axial direction of the tire body (111).

10. The drive wheel according to claim 9, characterized in that, The shock-absorbing hole (114) includes a first hollow portion (1141) and a second hollow portion (1142) that are interconnected. The first hollow portion (1141) extends circumferentially along the tire body (111), and the second hollow portion (1142) is located at one end of the first hollow portion (1141) and extends radially along the tire body (111). The second hollow portion (1142) is closer to the central region of the first protrusion (1121) than the first hollow portion (1141).

11. The drive wheel according to claim 10, characterized in that, Two shock-absorbing holes (114) are provided at each of the first protrusions (1121). The two shock-absorbing holes (114) are symmetrically distributed about a symmetrical plane, which is parallel to the axial and radial directions of the tire body (111), respectively.

12. The drive wheel according to claim 1, characterized in that, The drive wheel also includes an axle (14), a base (12), and a cover (13). The base (12) and the cover (13) are located on opposite sides of the axial direction of the tire (11). The base (12), the cover (13), and the tire (11) are connected to each other and coaxially fitted onto the axle (14).

13. A sweeping machine, characterized in that, The sweeper includes the drive wheel as described in any one of claims 1 to 12.

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