Caster wheel assembly and moving device

Abstract

This application provides a caster wheel assembly and a moving device. The caster wheel assembly includes a rotating component and a roller. The rotating component is rotatably mounted in the caster wheel mounting cavity of the moving device about a first rotation axis. The roller is rotatably mounted on the rotating component about a second rotation axis, the extension direction of which is perpendicular to the extension direction of the first rotation axis. At least a portion of the roller is exposed outside the rotating component. A first blocking structure is provided in at least a portion of the circumferential area of ​​the bottom of the rotating component, and the first blocking structure covers at least a partial area of ​​the roller exposed outside the rotating component. During use, the first blocking structure can prevent foreign objects such as particles and hair from adhering to the roller, reducing the amount of foreign objects entering the mating gap between the roller and the rotating component as the roller rolls. This reduces the likelihood of the caster wheel getting stuck due to foreign objects entering the mating gap, thereby reducing the frequency of cleaning the caster wheel and optimizing the user experience.

Description

Technical Field

[0001] This application relates to the field of omnidirectional wheel technology, specifically to an omnidirectional wheel assembly, and also to a mobile device. Background Technology

[0002] Casters, also known as swivel casters, can rotate 360 ​​degrees horizontally. Mobile devices such as vacuum cleaners, floor scrubbers, lawnmowers, and chairs that need to be moved are typically equipped with casters to facilitate adjustment of movement. However, during use, foreign objects such as particles and hair can easily adhere to the casters. As the casters roll, these objects can enter the gaps between the casters, potentially causing them to seize up. This necessitates frequent cleaning of the casters, negatively impacting the user experience. Utility Model Content

[0003] In view of this, this application provides a universal wheel assembly and a moving device to reduce the situation where the universal wheel gets stuck due to foreign objects entering the mating gap, thereby optimizing the user experience.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A caster wheel assembly includes a rotating member and a roller. The rotating member is rotatably disposed in a caster wheel mounting cavity of a mobile device about a first rotation axis. The roller is rotatably disposed on the rotating member about a second rotation axis, the extension direction of the second rotation axis being perpendicular to the extension direction of the first rotation axis. At least a portion of the roller is exposed outside the rotating member.

[0006] At least a portion of the circumferential region at the bottom of the rotating component is provided with a first blocking structure, which covers at least a partial area of ​​the roller exposed on the rotating component.

[0007] Optionally, in the above-mentioned caster wheel assembly, the roller includes an axle and a roller body sleeved on the axle;

[0008] The rotating component is provided with a roller mounting cavity, and the two ends of the wheel axle are respectively provided on two supporting side walls that are parallel to each other in the roller mounting cavity;

[0009] The axial length of the roller body is 1.0-1.4 mm smaller than the distance between the two supporting sidewalls.

[0010] Optionally, in the above-mentioned caster wheel assembly, the outer peripheral surface of the roller includes:

[0011] A bearing surface for contacting the ground, the bearing surface being located at the center of the roller's axial direction;

[0012] A clearance surface, located at least on one side of the bearing surface, extends from the end of the bearing surface to the end face of the roller on the same side as the clearance surface;

[0013] The bearing surface is a smooth annular surface that protrudes from both ends toward the middle part and in a direction away from the second rotation axis.

[0014] Optionally, in the above-mentioned caster wheel assembly, the clearance surface is a tapered surface that is inclined from the end near the bearing surface to the end away from the bearing surface and towards a position close to the second rotation axis.

[0015] Optionally, in the above-mentioned caster wheel assembly, the angle between the conical surface and the second rotation axis is 20°-23°.

[0016] Optionally, in the above-mentioned caster wheel assembly, the first blocking structure is detachably connected to the rotating component; and / or, the bottom end of the first blocking structure is not higher than the bottom end of the roller.

[0017] Optionally, in the above-mentioned caster wheel assembly, the first blocking structure is a brush strip or a flexible scraper strip.

[0018] In the universal wheel assembly provided in this application, at least a portion of the circumferential area at the bottom of the rotating component is provided with a first blocking structure, which covers at least a partial area of ​​the roller exposed outside the rotating component. With this configuration, the first blocking structure can block at least a partial area of ​​the roller exposed outside the rotating component; during use, the first blocking structure can prevent foreign objects such as particles and hair from adhering to the roller, reducing the amount of foreign objects entering the mating gap between the roller and the rotating component as the roller rolls, thereby reducing the possibility of the universal wheel getting stuck due to foreign objects entering the mating gap, thus reducing the frequency of cleaning the universal wheel and optimizing the user experience.

[0019] This application also provides a mobile device, including a mobile body and a caster wheel assembly disposed at the bottom of the mobile body, wherein the caster wheel assembly is any of the caster wheel assemblies described above. Since the caster wheel assembly has the aforementioned effects, and the mobile device having the caster wheel assembly has the same effects, it will not be described in detail here.

[0020] Optionally, the above-mentioned moving device further includes a rolling component disposed at the bottom of the moving body, wherein the bottom end of the roller is higher than the bottom end of the rolling component;

[0021] And / or, the moving body includes a fixing member having the universal wheel mounting cavity, and the rotating member is rotatably mounted on the fixing member about the first rotation axis; at least a portion of the bottom side wall of the universal wheel mounting cavity is provided with a second blocking structure, and the second blocking structure covers at least a partial area of ​​the roller exposed to the rotating member.

[0022] This application also provides another moving device, including a moving body and a caster wheel assembly disposed at the bottom of the moving body, the moving body including a fixing member having a caster wheel mounting cavity;

[0023] The caster wheel assembly includes a rotating component and a roller. The rotating component is rotatably disposed in the caster wheel mounting cavity about a first rotation axis. The roller is rotatably disposed on the rotating component about a second rotation axis, the extension direction of the second rotation axis being perpendicular to the extension direction of the first rotation axis. At least a portion of the roller is exposed outside the rotating component.

[0024] Wherein, at least a portion of the circumferential region at the bottom of the rotating component or at least a portion of the bottom of the side wall of the universal wheel mounting cavity is provided with a blocking structure, the blocking structure covering at least a partial area of ​​the roller exposed outside the rotating component.

[0025] In another mobile device provided in this application, a blocking structure is provided at least a portion of the circumferential area at the bottom of the rotating part of the caster assembly, or at least a portion of the bottom of the side wall of the caster mounting cavity of the fixing member; the blocking structure covers at least a partial area of ​​the roller exposed outside the rotating part. With this configuration, the blocking structure can block at least a partial area of ​​the roller exposed outside the rotating part; during use, the blocking structure can prevent foreign objects such as particles and hair from adhering to the roller, reducing the amount of foreign objects entering the mating gap between the roller and the rotating part as the roller rolls, thereby reducing the possibility of the caster jamming due to foreign objects entering the mating gap, thus reducing the frequency of cleaning the caster and optimizing the user experience.

[0026] Furthermore, in the caster wheel assembly of this application, only the bearing surface of the roller at the center of the axis contacts the ground; the clearance surfaces on both sides of the bearing surface clearance the side away from the ground, increasing the distance from the ground; when the roller's height from the ground decreases due to its own weight, the clearance surfaces on both sides of the bearing surface will not contact the ground, thus not increasing the roller's contact area with the ground; thus avoiding noise caused by the increase in the roller's contact area with the ground.

[0027] Optionally, the clearance surface is a conical surface that slopes from the end closest to the bearing surface toward the end furthest from the bearing surface, towards a position closer to the second axis of rotation. In this way, the clearance surface avoids the ground by sloping away from the ground. This slope avoids the smooth annular surface by a large distance, thus avoiding contact with the ground and reducing noise. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0029] Figure 1 A three-dimensional structural schematic diagram of an exemplary mobile device consistent with some embodiments of this application is shown;

[0030] Figure 2 A front view of an exemplary mobile device consistent with some embodiments of this application is shown;

[0031] Figure 3 A bottom view of an exemplary mobile device consistent with some embodiments of this application is shown;

[0032] Figure 4 It shows Figure 3 A magnified view of part D;

[0033] Figure 5 An exemplary mobile device consistent with some embodiments of this application is shown. Figure 3 A partial sectional view of the EE line;

[0034] Figure 6 An exemplary mobile device consistent with some embodiments of this application is shown. Figure 2 Sectional view of line AA in the middle;

[0035] Figure 7 A bottom view of another exemplary mobile device consistent with some embodiments of this application is shown;

[0036] Figure 8 It shows Figure 7 A magnified view of part C;

[0037] Figure 9 Another exemplary mobile device consistent with some embodiments of this application is shown. Figure 2 Sectional view of line AA in the middle;

[0038] Figure 10 An exemplary mobile device consistent with some embodiments of this application is shown. Figure 2 Sectional view of the middle BB line;

[0039] Figure 11 It shows Figure 10 A magnified view of part of F;

[0040] Figure 12A schematic diagram of an exemplary roller consistent with some embodiments of this application is shown.

[0041] superior Figure 1-12 middle:

[0042] 10-Fixed component; 101-Second blocking structure; 20-Rolling assembly; 30-Bearing; 40-Screw;

[0043] 1-Rotating component; 11-First blocking structure; 2-Roller; 21-Axle; 22-Coating layer; 22a-Bearing surface; 22b-Allowing surface; 23-Supporting layer; n-Dustproof gap; N-Angle between the conical surface and the second rotation axis. Detailed Implementation

[0044] This application provides a universal wheel assembly and a moving device, which can reduce the situation where the universal wheel gets stuck due to foreign objects entering the fitting gap, thereby optimizing the user experience.

[0045] 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, and 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.

[0046] like Figures 1-12 As shown, the universal wheel assembly provided in this application embodiment includes a rotating member 1 and a roller 2. The rotating member 1 is rotatably disposed in the universal wheel mounting cavity of the mobile device about a first rotation axis. The roller 2 is rotatably disposed on the rotating member 1 about a second rotation axis, the extension direction of the second rotation axis being perpendicular to the extension direction of the first rotation axis. At least a portion of the roller 2 is exposed outside the rotating member 1. A first blocking structure 11 is provided in at least a portion of the circumferential region at the bottom of the rotating member 1. The first blocking structure 11 covers at least a partial area of ​​the portion of the roller 2 exposed outside the rotating member 1.

[0047] In the universal wheel assembly provided in this application embodiment, at least a portion of the circumferential area at the bottom of the rotating component 1 is provided with a first blocking structure 11, which covers at least a partial area of ​​the roller 2 exposed outside the rotating component 1. With this configuration, the first blocking structure 11 can block at least a partial area of ​​the roller 2 exposed outside the rotating component 1. During use, the first blocking structure 11 can prevent foreign objects such as particles and hair from adhering to the roller 2, reducing the amount of foreign objects entering the mating gap between the roller 2 and the rotating component 1 as the roller 2 rolls. This reduces the likelihood of the universal wheel jamming due to foreign objects entering the mating gap, thereby reducing the frequency of cleaning the universal wheel and optimizing the user experience.

[0048] like Figures 3-6 As shown, a first blocking structure 11 may be provided in a partial circumferential area at the bottom of the rotating component 1. The first blocking structure 11 covers the portion of the roller 2 exposed on the rotating component 1 that is opposite to the first blocking structure 11. In some embodiments, the first blocking structure 11 may be an arc-shaped structure, which may be at an angle of 90°, 120°, 180°, or 210°. This arc-shaped structure may be located at the circumferential position of the roller 2 mounting cavity through-hole on the rotating component 1, or it may be located at other circumferential positions on the rotating component 1, and it can block the partially exposed area of ​​the roller 2. This arc-shaped structure may be arranged around the outer edge of the bottom of the rotating component 1 to avoid interfering with the operation of the roller 2; it may also be located in other areas of the bottom of the rotating component 1.

[0049] The bottom of the rotating component 1 may be provided with a first blocking structure 11 covering the entire circumferential area of ​​the roller 2 exposed on the rotating component 1. In some embodiments, the first blocking structure 11 may be an integral annular structure with a 360° angle; or it may be an annular structure formed by multiple arc-shaped structures. This annular structure is arranged around the entire circumference of the rotating component 1, and can block the entire exposed area of ​​the roller 2. This annular structure may be arranged around the outer edge of the bottom of the rotating component 1 to avoid interfering with the operation of the roller 2; or it may be arranged in other areas of the bottom of the rotating component 1.

[0050] In some embodiments, the roller 2 includes an axle 21 and a roller 2 body sleeved on the axle 21, such as Figures 10-12 As shown; the rotating component 1 is provided with a roller 2 mounting cavity, and the two ends of the axle 21 are respectively mounted on two supporting side walls arranged parallel to each other in the roller 2 mounting cavity. The axis of the axle 21 itself is the second rotation axis. The roller 2 is rotatably mounted on the rotating component 1 around the axle 21. The two supporting side walls of the axle 21 are arranged perpendicular to the axle 21.

[0051] The axial length of the roller 2 body is 1.0-1.4 mm smaller than the distance between the two support sidewalls. The axial length of the roller 2 body can be 1.0 mm, 1.1 mm, 1.2 mm, 1.1 mm, 1.4 mm, or other values ​​within the range of 1.0-1.4 mm smaller than the distance between the two support sidewalls. Thus, as... Figure 11 As shown, the dustproof gap n between the end faces of the roller 2 body at both ends and the supporting side wall of the corresponding roller 2 mounting cavity is designed to be a value in the range of 0.5-0.7mm, which can be 0.5mm, 0.6mm or 0.7mm, etc.

[0052] For example, the axial length of the roller 2 body is 7.3mm, and the distance between the two supporting sidewalls is 8.5mm. The axial length of the roller 2 body is 1.2mm smaller than the distance between the two supporting sidewalls. Thus, the dustproof gap n between the end faces of the roller 2 body and the supporting sidewalls of the corresponding roller 2 mounting cavity is 0.6mm. As the roller 2 body rolls, there will be a certain amount of axial movement, and the dustproof gap n on both sides will be adjusted accordingly. The size of the dustproof gap n can prevent particles from entering and causing the roller 2 to jam due to excessive gap; it can also prevent hair from quickly filling the wheel axle 21 and causing the roller 2 to jam due to insufficient axial movement of the roller 2 body, thus accelerating the wear at the end walls of the roller 2 body. In conjunction with the first blocking structure 11 set at the bottom of the rotating part 1, it can better prevent the universal wheel from jamming due to foreign objects entering the fitting gap.

[0053] In the comparative verification, taking the dustproof gaps n designed between the end faces of the roller 2 body and the corresponding support sidewalls of the roller 2 mounting cavity as examples (0.4mm, 0.5mm, 0.6mm, 0.7mm, and 0.8mm respectively), the time for the roller 2 to fully lock was statistically analyzed. Among these, compared to dustproof gaps of other sizes, the time for the roller 2 to first lock was longer for dustproof gaps in the range of 0.5-0.7mm. Therefore, the relationship between the axial length of the roller 2 body and the distance between the two support sidewalls in this embodiment provides a better anti-hair entanglement and anti-jamming effect.

[0054] In some embodiments, the roller 2 can be a single-wheel structure, which is simpler, lower in cost, and has a better anti-tangling effect.

[0055] like Figures 10-12 As shown, in some embodiments, the roller 2 body includes a support layer 23 and a rubber coating layer 22; the axle 21 passes through the support layer 23, and the rubber coating layer 22 wraps around the outer periphery of the support layer 23. The outer periphery of the support layer 23 is the outer circumferential surface of the support layer 23 arranged circumferentially around the second rotation axis. The axle 21 can be a stainless steel axle, which has good support strength. The support layer 23 can be a POM (polyformaldehyde) layer; because POM material itself has certain lubricating properties, and the stainless steel axle can control the surface finish during production, the use of a POM material support layer 23 in combination with a stainless steel axle can reduce friction noise. The rubber coating layer 22 can be a PVC (polyvinyl chloride) layer. PVC is a soft rubber material, which can reduce the friction between the rubber coating layer 22 and the ground, resulting in better noise reduction; with this arrangement, the POM layer and the PVC layer together form a double-layer rubber coating structure for the roller 2 body, achieving a synergistic effect of wear resistance and noise reduction.

[0056] In this embodiment, the roller 2 is a multi-layer composite structure composed of a stainless steel axle 21, a POM support layer 23, and a PVC coating layer 22, which achieves corrosion resistance, noise reduction, and anti-tangling functions.

[0057] In some embodiments, the outer peripheral surface of the roller 2 includes: a bearing surface 22a for contacting the ground, the bearing surface 22a being located at the center of the roller 2's axial direction; and a clearance surface 22b, located at least on one side of the bearing surface 22a, extending from the end of the bearing surface 22a to the end face of the roller 2 on the same side as the clearance surface 22b; wherein the bearing surface 22a is an annular smooth surface protruding from both ends toward the middle portion in a direction away from the second rotation axis. The outer peripheral surface of the roller 2 is an outer circumferential surface circumferentially arranged around the second rotation axis of the roller 2.

[0058] The clearance surface 22b can be located on one side of the bearing surface 22a or on both sides of the bearing surface 22a. Preferably, the clearance surface 22b is located on both sides of the bearing surface 22a to achieve force balance on the roller 2 and improve operational stability.

[0059] During operation, only the bearing surface 22a at the center of the roller 2 contacts the ground; the clearance surfaces 22b on both sides of the bearing surface 22a move away from the ground, increasing the distance from the ground; when the roller 2's height from the ground decreases due to its own weight, the clearance surfaces 22b on both sides of the bearing surface 22a will not contact the ground, thus not increasing the ground contact area of ​​the roller 2; this avoids noise caused by an increase in the ground contact area of ​​the roller 2.

[0060] like Figure 12 As shown, the bearing surface 22a is a smooth annular surface protruding from both ends towards the middle. This creates an annular protrusion in the middle of the roller 2's axial direction, reducing the contact area with the ground and lowering noise. The smooth annular surface is a smoothly transitioning arc-shaped surface, with the radius of the arc in the middle section being smaller than that at both ends, making the middle section the main bearing part and ensuring rolling stability. Alternatively, the entire surface can be smoothly connected using the same rounded corner radius.

[0061] In other embodiments, the bearing surface 22a may also be a cylindrical surface of equal diameter.

[0062] In some embodiments, the clearance surface 22b is a tapered surface that slopes from one end near the bearing surface 22a toward the end away from the bearing surface 22a, towards a position close to the second rotation axis. For example... Figure 12 As shown, the avoidance surface 22b avoids the ground by sloping away from the ground. The sloping surface avoids the smooth annular surface by a large distance and is far from the ground, which can avoid touching the ground and thus reduce noise.

[0063] The conical surface gradually increases in distance from the ground from the end closest to the bearing surface 22a to the end furthest from the bearing surface 22a, with a consistent increase in distance. This results in good force transmission, a simple structure, and ease of manufacturing. Of course, the clearance surface 22b can also be other annular shapes, such as concave arc surfaces or bent surfaces.

[0064] In some embodiments, the angle N between the conical surface and the second rotation axis is 20°-23°. The angle N between the conical surface and the second rotation axis can be 20°, 21°, 22°, 23°, or other angles within the range of 20°-23°. This reduces the contact area between the roller 2 and the ground while maintaining the load-bearing strength of the roller 2 and ensuring driving stability. It avoids the conical surface having an excessively large tilt angle relative to the second rotation axis, which could affect the load-bearing strength of the roller 2; it also avoids the conical surface having an excessively small tilt angle relative to the second rotation axis, resulting in it touching the ground too closely and generating noise.

[0065] In some embodiments, the first blocking structure 11 is detachably connected to the rotating member 1. The first blocking structure 11 can be fixed to the bottom of the rotating member 1 by means of adhesive, threaded connection, or snap-fit, which facilitates the disassembly and assembly of the first blocking structure 11, thereby enabling the cleaning or replacement of the first blocking structure 11 and improving the working reliability of the first blocking structure 11. The first blocking structure 11 can also be fixedly connected to the rotating member 1 or integrally formed, allowing the first blocking structure 11 to be cleaned by cleaning the entire caster wheel assembly.

[0066] In some embodiments, the bottom end of the first blocking structure 11 is not higher than the bottom end of the roller 2. The bottom end of the first blocking structure 11 can be flush with or lower than the bottom end of the roller 2. With this configuration, the first blocking structure 11 can be close to the ground, which improves the blocking effect against foreign objects on the ground and optimizes the anti-jamming effect of the caster wheel. The height of the first blocking structure 11 can be adapted to the setting position. For example, if the first blocking structure 11 is close to the ground of the rotating part 1, the height of the first blocking structure 11 is 3.6mm, which can prevent foreign objects from jamming the caster wheel assembly and improve the tangling effect.

[0067] In some embodiments, the first blocking structure 11 is a brush strip or a flexible scraper. The first blocking structure 11 can be a brush strip, composed of multiple brushes arranged side-by-side and closely spaced, which, while blocking foreign objects, sweeps them away from the roller 2, further reducing the probability of foreign objects entering the mating gap of the caster assembly. The first blocking structure 11 can also be a flexible scraper, which has a certain supporting stiffness and can deform. For example, a rubber scraper can produce a certain amount of cushioning deformation, preventing damage to the ground and reducing noise.

[0068] In some embodiments, the rotating component 1 can be a rotating bracket or a rotating shaft; the axis of the rotating component 1 itself is the first rotation axis. The rotating component 1 is rotatably mounted in the universal wheel mounting cavity of the mobile device via a bearing 30 around the first rotation axis; the outer ring of the bearing 30 is fixed to the inner wall of the universal wheel mounting cavity by an interference fit, and the rotating component 1 is fixed to the inner ring of the bearing 30 by an interference fit; with this configuration, the rotating component 1 can rotate around the bearing 30 around the first rotation axis, resulting in better rotational stability. A limiting step is provided on the outer periphery of the rotating component 1 to position and engage with the bottom end of the inner ring of the bearing 30, and a screw 40 is threadedly connected to the top of the rotating component 1, with the outer ring of the screw head overlapping the top end of the inner ring of the bearing 30, thereby achieving an axial fixed connection between the rotating component 1 and the bearing 30; the screw 40 and the top of the rotating component 1 can be easily disassembled and assembled in the universal wheel mounting cavity.

[0069] like Figures 1-3 , Figure 7 As shown, this application embodiment also provides a mobile device, including a mobile main body and a caster wheel assembly disposed at the bottom of the mobile main body. The caster wheel assembly is the caster wheel assembly of any of the above embodiments. This reduces the possibility of the caster wheel getting stuck due to foreign objects entering the mating gap, thereby optimizing the user experience. This advantage is brought about by the caster wheel assembly; please refer to the relevant parts in the above embodiments for details, which will not be repeated here. For example, the mobile device can be a cleaning device such as a vacuum cleaner, floor scrubber, or robotic vacuum cleaner, or other devices that require silent movement or prevention of foreign object entanglement, such as a lawnmower, chair, or smart furniture.

[0070] In some embodiments, the mobile device further includes a rolling assembly 20 disposed at the bottom of the mobile body, with the bottom end of the roller 2 higher than the bottom end of the rolling assembly 20. The rolling assembly 20 rolls together with the roller 2, making the movement smoother.

[0071] The rolling component 20 can be a roller brush structure, formed by coating a roller brush wheel with a layer of soft rubber or bristles; in this case, the bottom end of the roller 2 is higher than the bottom end of the roller brush structure, i.e., the bottom end of the outer coating layer of the roller brush wheel. Alternatively, the rolling component 20 can be a roller brush assembly, including two roller brush wheels and a track surrounding and connecting the two roller brush wheels; in this case, the bottom end of the roller 2 is higher than the bottom end of the roller brush assembly, i.e., the bottom end of the track. This allows for both assisting in movement and performing the function of cleaning the ground with a roller brush, increasing the functionality of the mobile device.

[0072] The rolling component 20 can also be a separate traveling wheel, which only enables the traveling function of the auxiliary omnidirectional wheel.

[0073] like Figure 6 , Figure 9As shown, the bottom of roller 2 is higher than the bottom of rolling assembly 20. This means that when the mobile device is assembled but not in operation, the bottom of roller 2 is higher than the bottom of rolling assembly 20. In other words, the bottom of roller 2 is designed to have a gap with the ground. This is to compensate for the reduction in the ground clearance of roller 2 due to its own weight after the mobile device is placed on the ground, thereby reducing the contact area between roller 2 and the ground and thus reducing noise. The effect of reducing the contact area is even better when combined with the conical avoidance surface 22b.

[0074] The distance from the bottom of roller 2 to the ground can be 0.15-0.2mm, that is, the bottom of roller 2 can be 0.15-0.2mm higher than the bottom of rolling assembly 20, such as 0.15mm, 0.16mm, 0.18mm, 0.2mm, etc. When the bottom of roller 2 is designed to be higher than the ground by the above-mentioned gap, it can ensure that roller 2 is in contact with the ground under the action of gravity, and can also avoid the situation where roller 2 is suspended in the air and does not contact the ground.

[0075] In some embodiments, the movable body includes a fixing member 10 having a universal wheel mounting cavity, and a rotating member 1 is rotatably mounted on the fixing member 10 about a first rotation axis; at least a portion of the bottom sidewall of the universal wheel mounting cavity is provided with a second blocking structure 101, and the second blocking structure 101 covers at least a partial area of ​​the roller 2 exposed to the rotating member 1.

[0076] At least a portion of the bottom sidewall of the universal wheel mounting cavity of the fixing member 10 is provided with a second blocking structure 101; the second blocking structure 101 covers at least a partial area of ​​the roller 2 exposed outside the rotating member 1. With this configuration, the second blocking structure 101 can block at least a partial area of ​​the roller 2 exposed outside the rotating member 1; during use, the second blocking structure 101 can prevent foreign objects such as particles and hair from adhering to the roller 2, reducing the amount of foreign objects entering the mating gap between the roller 2 and the rotating member 1 as the roller 2 rolls, thereby reducing the possibility of the universal wheel getting stuck due to foreign objects entering the mating gap, thus reducing the frequency of cleaning the universal wheel and optimizing the user experience.

[0077] The universal wheel mounting cavity may have a second blocking structure 101 partially provided on the bottom of its side wall. The second blocking structure 101 covers the portion of the roller 2 exposed to the rotating member 1, opposite to the local area of ​​the second blocking structure 101. In some embodiments, the second blocking structure 101 may be an arc-shaped structure, which may be at an angle of 90°, 120°, 180°, or 210°. This arc-shaped structure may be located on the front side of the universal wheel mounting cavity along the moving direction of the moving device, or it may be located at other circumferential positions within the universal wheel mounting cavity, capable of blocking the locally exposed area of ​​the roller 2.

[0078] The universal wheel mounting cavity may have a second blocking structure 101 provided on the bottom of all side walls. The second blocking structure 101 covers the entire area of ​​the roller 2 exposed to the rotating part 1. In some embodiments, the second blocking structure 101 may be an integral annular structure with a 360° angle, such as... Figures 7-9 As shown; it can also be a ring structure formed by multiple arc-shaped structures. This ring structure is arranged around the entire circumference of the universal wheel mounting cavity, which can block the entire exposed area of ​​the roller 2.

[0079] Except for the installation position, the second blocking structure 101 can be fixed in the same way and in the same way as the first blocking structure 11, and will not be described in detail here.

[0080] This application embodiment also provides another moving device, including a moving body and a universal wheel assembly disposed at the bottom of the moving body, the moving body including a fixing member 10 provided with a universal wheel mounting cavity;

[0081] The caster wheel assembly includes a rotating component 1 and a roller 2. The rotating component 1 is rotatably disposed in the caster wheel mounting cavity about a first rotation axis. The roller 2 is rotatably disposed on the rotating component 1 about a second rotation axis, the extension direction of the second rotation axis being perpendicular to the extension direction of the first rotation axis. At least a portion of the roller 2 is exposed outside the rotating component 1.

[0082] Wherein, at least a portion of the circumferential region at the bottom of the rotating member 1 or at least a portion of the bottom of the side wall of the universal wheel mounting cavity is provided with a blocking structure, and the blocking structure covers at least a partial area of ​​the part of the roller 2 exposed outside the rotating member 1.

[0083] In another mobile device provided in this application, a blocking structure is provided at least a portion of the circumferential area at the bottom of the rotating part 1 of the universal wheel assembly, or at least a portion of the bottom of the side wall of the universal wheel mounting cavity of the fixing member 10; the blocking structure covers at least a partial area of ​​the part of the roller 2 exposed outside the rotating part 1. With this configuration, the blocking structure can block at least a partial area of ​​the part of the roller 2 exposed outside the rotating part 1; during use, the blocking structure can prevent foreign objects such as particles and hair from adhering to the roller 2, reducing the amount of foreign objects entering the mating gap between the roller 2 and the rotating part 1 as the roller 2 rolls, thereby reducing the possibility of the universal wheel getting stuck due to foreign objects entering the mating gap, thus reducing the frequency of cleaning the universal wheel and optimizing the user experience.

[0084] like Figures 3-6 As shown, the blocking structure can be set in at least part of the circumferential region at the bottom of the rotating part 1 of the universal wheel assembly. In this case, the structure of the blocking structure is the same as the first blocking structure 11 described above, and will not be described in detail here.

[0085] like Figures 7-9As shown, the blocking structure can also be set at the bottom of at least part of the side wall of the universal wheel mounting cavity of the fixing member 10. In this case, the structure of the blocking structure is the same as the second blocking structure 101 described above, and will not be described in detail here. Both can achieve the goal of covering at least a partial area of ​​the part of the roller 2 exposed to the rotating member 1.

[0086] For example, the other mobile device can be a cleaning device such as a vacuum cleaner, floor scrubber, or robot vacuum cleaner, or other devices that require quiet movement or protection from foreign objects, such as a lawnmower, chair, or smart furniture.

[0087] The test parameters in the table below take a vacuum cleaner as a mobile device as an example, the universal wheel assembly as the small wheel of the vacuum cleaner, and hair as a foreign object for testing; the test results show that the total amount of hair on the small wheel is 0, indicating that the universal wheel assembly provided in this application embodiment has a good anti-hair tangling effect and can reduce the situation where the universal wheel gets stuck due to foreign objects entering the fitting gap of the universal wheel.

[0088]

[0089] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0090] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0091] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0092] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0093] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0094] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A caster wheel assembly, comprising a rotating member and a roller, the rotating member being rotatably disposed in a caster wheel mounting cavity of a moving device about a first rotation axis; the roller being rotatably disposed on the rotating member about a second rotation axis, the extension direction of the second rotation axis being perpendicular to the extension direction of the first rotation axis, and at least a portion of the roller being exposed outside the rotating member; characterized in that, At least a portion of the circumferential region at the bottom of the rotating component is provided with a first blocking structure, which covers at least a partial area of ​​the portion of the roller exposed on the rotating component.

2. The universal wheel assembly of claim 1, wherein, The roller includes an axle and a roller body sleeved on the axle; The rotating component is provided with a roller mounting cavity, and the two ends of the wheel axle are respectively provided on two supporting side walls that are parallel to each other in the roller mounting cavity; The axial length of the roller body is 1.0-1.4 mm smaller than the distance between the two supporting sidewalls.

3. The universal wheel assembly of claim 1, wherein, The outer circumferential surface of the roller includes: A bearing surface for contacting the ground, the bearing surface being located at the center of the roller's axial direction; A clearance surface, located at least on one side of the bearing surface, extends from the end of the bearing surface to the end face of the roller on the same side as the clearance surface; The bearing surface is a smooth annular surface that protrudes from both ends toward the middle part and in a direction away from the second rotation axis.

4. The omni-wheel assembly of claim 3, wherein, The clearance surface is a tapered surface that slopes from the end closest to the bearing surface toward the end furthest from the bearing surface toward a position close to the second rotation axis.

5. The omni-wheel assembly of claim 4, wherein, The angle between the conical surface and the second rotation axis is 20°-23°.

6. The caster wheel assembly according to any one of claims 1-5, characterized in that, The first blocking structure is detachably connected to the rotating component; and / or, the bottom end of the first blocking structure is not higher than the bottom end of the roller.

7. The universal wheel assembly of any of claims 1-5, wherein, The first blocking structure is a brush strip or a flexible scraper strip.

8. A mobile device comprising a mobile body and a caster assembly disposed at the bottom of the mobile body, characterized by, The caster wheel assembly is the caster wheel assembly as described in any one of claims 1-7.

9. The mobile device of claim 8, wherein, The moving device further includes a rolling component disposed at the bottom of the moving body, wherein the bottom end of the roller is higher than the bottom end of the rolling component; And / or, the moving body includes a fixing member having the universal wheel mounting cavity, and the rotating member is rotatably mounted on the fixing member about the first rotation axis; at least a portion of the bottom sidewall of the universal wheel mounting cavity is provided with a second blocking structure, and the second blocking structure covers at least a partial area of ​​the portion of the roller exposed to the rotating member.

10. A mobile device comprising a mobile body and a caster assembly disposed at a bottom of the mobile body, characterized by, The movable body includes a fixing component with a universal wheel mounting cavity; The universal wheel assembly includes a rotating component and a roller. The rotating component is rotatably disposed in the universal wheel mounting cavity about a first rotation axis. The roller is rotatably disposed on the rotating component about a second rotation axis, the extension direction of the second rotation axis being perpendicular to the extension direction of the first rotation axis. At least a portion of the roller is exposed outside the rotating component. Wherein, at least a portion of the circumferential region at the bottom of the rotating component or at least a portion of the bottom of the side wall of the universal wheel mounting cavity is provided with a blocking structure, the blocking structure covering at least a partial area of ​​the portion of the roller exposed on the rotating component.

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