A Mecanum wheel

Abstract

The utility model relates to mobile wheel technical field provides a kind of Mecanum wheel, each roller assembly is installed on connecting shaft by shaft sleeve, it is convenient for roller assembly to rotate around the axis of connecting shaft;Since the both ends of roller assembly respectively exceed the outside of corresponding shaft sleeve, therefore, the sealing body of sealing assembly can be sealed between roller assembly and connecting shaft, and with shaft sleeve abuts, realize the effective sealing of roller assembly end part.Due to the double-layer structure of annular frame and sealing sleeve, the sealing body is provided with structural strength, avoid the gap between sealing body and roller assembly due to the weak strength of sealing body in the process of rotation, it is favorable to strengthen the sealing performance of sealing body, improve the effect of oil leakage prevention.In addition, the end cover of sealing assembly abuts in the end part of roller assembly, equivalent to sealing body is enclosed between roller assembly and connecting shaft, forms additional sealing layer.In this way, improve sealing, reduce the probability of oil leakage phenomenon, ensure that walking pavement is neat.

Description

Technical Field

[0001] This utility model belongs to the field of mobile wheel technology, and particularly relates to a Mecanum wheel. Background Technology

[0002] Mecanum wheels are omnidirectional wheels, based on the principle of a central wheel with many axles located around the wheel. These angled peripheral axles convert a portion of the wheel's steering force into a wheel's normal force, thus enabling multi-directional movement.

[0003] Mecanum wheels typically consist of a connecting shaft, a bushing, and a roller assembly. The roller assembly rotates by being rotatably fitted onto the connecting shaft via the bushing. To reduce friction and improve rotational stability, lubricating oil is usually filled between the bushing and the connecting shaft. However, due to the limitations of traditional Mecanum wheel design, lubricating oil leakage is prone to occur, causing the road surface to become dirty. Utility Model Content

[0004] Based on the above background, the purpose of this utility model is to provide a Mecanum wheel that improves sealing performance, reduces the probability of oil leakage, and ensures a clean road surface.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A Mecanum wheel includes: a hub assembly; a plurality of connecting shafts spaced apart circumferentially along the hub assembly, wherein the axes of the connecting shafts intersect the axis of the hub assembly, and a plurality of bushings are spaced apart on each connecting shaft; a roller assembly fitted onto the bushings on each connecting shaft, wherein both ends of the roller assembly extend beyond the corresponding bushings along its own axis; and a sealing assembly fitted onto both ends of each connecting shaft along its own axis, and sealingly engaging with the ends of the roller assembly; wherein each sealing assembly includes an end cap and a sealing body disposed on the end cap, the end cap being fitted onto the connecting shaft and abutting against the end of the roller assembly, the sealing body including an annular frame and a sealing sleeve fitted onto the outer surface of the annular frame, the annular frame and the sealing sleeve being located between the end of the roller assembly and the connecting shaft, and both abutting against the bushings, and the surface of the sealing sleeve facing away from the annular frame sealingly abutting against the inner side of the roller assembly.

[0007] Furthermore, the end cap includes a cap body and an annular protrusion protruding from the cap body. Both the cap body and the annular protrusion are sleeved on the connecting shaft, and the annular protrusion is located between the end of the connecting shaft and the roller assembly. The annular frame is sleeved on the annular protrusion.

[0008] Furthermore, the outer surface of the annular frame is provided with a mounting groove, which is arranged circumferentially along the annular frame, and the shaft sleeve is disposed in the mounting groove.

[0009] Furthermore, the Mecanum wheel also includes a fixing component, and the hub assembly includes two hub pieces that are connected to each other in the middle, with both ends of each connecting shaft fixed to the two hub pieces by the fixing component.

[0010] Furthermore, protective grooves are recessed on both back-to-back surfaces of the two hub components, and mounting holes are provided in at least a portion of the protective grooves. The fixing component is located in at least a portion of the protective grooves and is connected to the connecting shaft through the mounting holes.

[0011] Furthermore, at least a portion of the protective groove wall includes a protective wall and a bottom wall. The protective wall extends along the axial direction of the connecting shaft and extends beyond the fixing component. The bottom wall extends to the surface of the hub component in a direction intersecting the connecting shaft. The mounting hole is provided in the bottom wall.

[0012] Furthermore, the bottom wall is provided with an anti-rotation protrusion, which is located on the outer periphery of the mounting hole, and the fixing component is provided with a mating part that cooperates with the anti-rotation protrusion.

[0013] Furthermore, at least a portion of the fixing component includes a flange portion and a connecting portion disposed on the surface of the flange portion, the connecting portion passing through the mounting hole and connected to the connecting shaft, and the flange portion abutting against the groove wall of at least a portion of the protective groove.

[0014] This utility model has the following beneficial effects:

[0015] (1) Each roller assembly is mounted on the connecting shaft via bushings, allowing the roller assembly to rotate around the axis of the connecting shaft. Since both ends of the roller assembly extend beyond the corresponding bushings, the sealing body of the sealing assembly can seal between the roller assembly and the connecting shaft, and abut against the bushings, achieving effective sealing at the ends of the roller assembly. Furthermore, because the sealing body has a double-layer structure of an annular frame and a sealing sleeve, the annular frame provides structural strength to the sealing body, preventing gaps from forming between the sealing body and the roller assembly due to insufficient strength during rotation. This enhances the sealing performance of the sealing body and improves the oil leakage prevention effect. In addition, the end cap of the sealing assembly abuts against the ends of the roller assembly, effectively sealing the sealing body between the roller assembly and the connecting shaft, forming an additional sealing layer, greatly improving the sealing performance of the Mecanum wheel. This design improves sealing performance, reduces the probability of oil leakage, and ensures a clean road surface.

[0016] (2) An annular protrusion is provided on the surface of the cover body. The annular protrusion is sleeved on the part of the connecting shaft located inside the roller assembly, so that the annular frame is stably located between the connecting shaft and the roller assembly, thereby making the sealing sleeve and the inner side of the roller assembly fit tightly together to achieve effective sealing.

[0017] (3) An installation groove is provided on the outer surface of the ring frame so that the sealing sleeve is stably fixed on the ring frame, reducing the deformation of the sealing sleeve due to external extrusion pressure. This not only improves the stability of the structure, but also further improves the sealing effect.

[0018] (4) A protective groove and mounting holes are provided on the outer surface of the hub component. The mounting holes facilitate the connection between the fixing component and the connecting shaft. At the same time, the mounting holes are set in the protective groove so that the fixing component can be built into the protective groove, preventing the fixing component from protruding from the surface of the hub component and scratching external objects. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 Here is a structural diagram of a Mecanum wheel provided in one embodiment;

[0021] Figure 2 This is a structural diagram showing the assembly of the roller assembly, connecting shaft, and sealing assembly provided in one embodiment.

[0022] Figure 3 An exploded view of the structure of the roller assembly, connecting shaft, and sealing assembly provided in one embodiment;

[0023] Figure 4 This is a structural cross-sectional view of the roller assembly, connecting shaft, and sealing assembly provided in one embodiment.

[0024] Figure 5 An exploded view of the structure of a sealing body provided in one embodiment;

[0025] Figure 6 This is a structural diagram of a wheel hub component provided in one embodiment.

[0026] Explanation of icon numbers:

[0027] 100. Mecanum wheel; 10. Hub assembly; 11. Hub component; 12. Protective groove; 121. Protective wall; 122. Bottom wall; 123. Anti-rotation protrusion; 13. Mounting hole; 20. Connecting shaft; 21. Bushing; 30. Roller assembly; 31. Inner core; 32. Roller sleeve; 40. Sealing assembly; 41. End cap; 411. Annular protrusion; 412. Cover body; 42. Sealing body; 421. Annular frame; 422. Mounting groove; 423. Sealing sleeve; 50. Fixing component; 51. Flange; 52. Connecting part; 53. Mating part.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0032] In one embodiment, please refer to Figures 1 to 4This application provides a Mecanum wheel 100, including: a hub assembly 10, a plurality of connecting shafts 20, a roller assembly 30, and a sealing assembly 40. The plurality of connecting shafts 20 are spaced apart circumferentially along the hub assembly 10, and the axes of the connecting shafts 20 intersect the axis of the hub assembly 10. Each connecting shaft 20 is fitted with a plurality of bushings 21 at intervals. The roller assemblies 30 are fitted onto the bushings 21 on each connecting shaft 20, and both ends of the roller assemblies 30 extend beyond the corresponding bushings 21 along their own axial direction. Each connecting shaft 20 has a sealing assembly 40 fitted at both ends along its own axis, and it is sealed to the end of the roller assembly 30. Each sealing assembly 40 includes an end cap 41 and a sealing body 42 disposed on the end cap 41. The end cap 41 is fitted onto the connecting shaft 20 and abuts against the end of the roller assembly 30. The sealing body 42 includes an annular frame 421 and a sealing sleeve 423 fitted onto the outer surface of the annular frame 421. The annular frame 421 and the sealing sleeve 423 are both located between the end of the roller assembly 30 and the connecting shaft 20, and both abut against the bushing 21. The surface of the sealing sleeve 423 facing away from the annular frame 421 is sealed to the inner side of the roller assembly 30.

[0033] The aforementioned Mecanum wheel 100 mounts each roller assembly 30 onto the connecting shaft 20 via bushings 21, facilitating rotation of the roller assembly 30 around the axis of the connecting shaft 20. Since both ends of the roller assembly 30 extend beyond the corresponding bushings 21, the sealing body 42 of the sealing assembly 40 can seal between the roller assembly 30 and the connecting shaft 20, abutting against the bushings 21 to achieve effective sealing at the ends of the roller assembly 30. Furthermore, because the sealing body 42 has a double-layer structure of an annular frame 421 and a sealing sleeve 423, the annular frame 421 provides structural strength to the sealing body 42, preventing gaps from forming between the sealing body 42 and the roller assembly 30 due to insufficient strength during rotation. This enhances the sealing performance of the sealing body 42 and improves the oil leakage prevention effect. Furthermore, the end cap 41 of the sealing assembly 40 abuts against the end of the roller assembly 30, effectively sealing the sealing body 42 between the roller assembly 30 and the connecting shaft 20, forming an additional sealing layer and greatly improving the sealing performance of the Mecanum wheel 100. This design improves sealing performance, reduces the chance of oil leakage, and ensures a clean road surface.

[0034] It should be explained that, to facilitate the rotation of the roller assembly 30 and reduce friction, lubricating oil is usually applied to components such as the connecting shaft 20 and the bushing 21. During operation, due to the limitations of traditional structural design, some lubricating oil may seep out of the roller assembly 30, causing the road surface to be easily contaminated with oil. Therefore, this embodiment introduces structures such as the end cap 41, the sealing sleeve 423, and the ring frame 421 to form multiple layers of sealing protection between the connecting shaft 20, the bushing 21, and the roller assembly 30, greatly improving the sealing effect and preventing lubricating oil from seeping out and contaminating the road surface.

[0035] The axis of the connecting shaft 20 intersects the axis of the hub assembly 10, for example, the angle between their axes is 45°. The roller assembly 30 may include an inner core 31 and a roller sleeve 32, with the roller sleeve 32 covering the inner core 31. The inner core 31 is mounted on the connecting shaft 20 via a bushing 21.

[0036] Further, please refer to Figure 4 The end cap 41 includes a cap body 412 and an annular protrusion 411 protruding from the cap body 412. Both the cap body 412 and the annular protrusion 411 are sleeved on the connecting shaft 20, and the annular protrusion 411 is located between the ends of the connecting shaft 20 and the roller assembly 30. An annular frame 421 is sleeved on the annular protrusion 411. It can be seen that the annular protrusion 411 is provided on the surface of the cap body 412. By using the annular protrusion 411 to fit on the part of the connecting shaft 20 located inside the roller assembly 30, the annular frame 421 is stably located between the connecting shaft 20 and the roller assembly 30, thereby making the sealing sleeve 423 tightly fit the inner side of the roller assembly 30, achieving an effective seal.

[0037] It should be explained that the annular protrusion 411 is fitted onto the connecting shaft 20 and extends at least partially between the connecting shaft 20 and the roller assembly 30, facilitating the sealing installation of the sealing body 42 between the connecting shaft 20 and the roller assembly 30. The annular protrusion 411 can be fixed to the cover body 412 by means of bolt connection, snap-fit, riveting, welding, or bonding; or, the annular protrusion 411 and the cover body 412 are an integral structure.

[0038] Furthermore, please refer to Figure 5 The outer surface of the annular frame 421 is provided with a mounting groove 422, which is arranged circumferentially around the annular frame 421, and the bushing 21 is disposed in the mounting groove 422. It can be seen that the mounting groove 422 on the outer surface of the annular frame 421 makes the sealing sleeve 423 stably fixed on the annular frame 421, reducing the deformation of the sealing sleeve 423 due to external extrusion pressure, which not only improves the stability of the structure, but also further improves the sealing effect.

[0039] It should be explained that the ring frame 421 is provided with a mounting groove 422, which facilitates the confinement of the sealing sleeve 423 within the mounting groove 422, preventing slippage and improving structural stability. Simultaneously, after the sealing sleeve 423 is fixed in the mounting groove 422, a portion of it protrudes outside the mounting groove 422, facilitating a sealing contact with the inner side of the roller assembly 30. The material of the sealing sleeve 423 can be of various types, such as, but not limited to, rubber.

[0040] In one embodiment, please refer to Figure 2 and Figure 3The Mecanum wheel 100 also includes a fixing component 50. The hub assembly 10 includes two hub pieces 11 connected to each other in the middle. Both ends of each connecting shaft 20 are fixed to the two hub pieces 11 by the fixing component 50. It can be seen that the fixing component 50 makes the connecting shaft 20 stably fixed to the hub piece 11, thereby improving the stability of the Mecanum wheel 100.

[0041] Further, please refer to Figure 1 and Figure 6 Each of the two wheel hub components 11 has a protective groove 12 recessed on its two opposing surfaces. At least a portion of the protective groove 12 contains a mounting hole 13. The fixing component 50 is located within at least a portion of the protective groove 12 and is connected to the connecting shaft 20 through the mounting hole 13. It is understood that the protective groove 12 and mounting hole 13 are provided on the outer surface of the wheel hub component 11. The mounting hole 13 facilitates the connection between the fixing component 50 and the connecting shaft 20. Simultaneously, the mounting hole 13 is located within the protective groove 12, allowing the fixing component 50 to be housed within the protective groove 12, preventing the fixing component 50 from protruding from the surface of the wheel hub component 11 and scratching external objects.

[0042] In one embodiment, please refer to Figure 6 At least part of the protective groove 12 has a protective wall 121 and a bottom wall 122. The protective wall 121 extends along the axial direction of the connecting shaft 20 and extends beyond the fixing component 50. The bottom wall 122 extends to the surface of the hub component 11 in a direction intersecting with the connecting shaft 20. The mounting hole 13 is provided in the bottom wall 122. It can be seen that the protective wall 121 and the bottom wall 122 form an L-shaped structure. In this way, the fixing component 50 can be protected by the protective wall 121, preventing the fixing component 50 from easily interfering with external objects. At the same time, the bottom wall 122 extends to the surface of the hub component 11, thus facilitating the operator to operate the fixing component 50 along the surface of the bottom wall 122 to fix the connecting shaft 20, improving the convenience of assembly.

[0043] It should be explained that there are multiple protective grooves 12, and all protective grooves 12 are spaced apart along the circumference of the hub component 11.

[0044] In one embodiment, please refer to Figure 3 and Figure 6 The bottom wall 122 has a raised anti-rotation protrusion 123, which is located on the outer periphery of the mounting hole 13. The fixing member 50 has a mating part 53 that cooperates with the anti-rotation protrusion 123. In this way, the rotation of the fixing member 50 is restricted by the anti-rotation protrusion 123 and the mating part 53, so as to prevent the fixing member 50 from becoming loose due to rotation.

[0045] In one embodiment, please refer to Figure 3At least a portion of the fixing component 50 includes a flange portion 51 and a connecting portion 52 provided on the surface of the flange portion 51. The connecting portion 52 passes through the mounting hole 13 and is connected to the connecting shaft 20. The flange portion 51 abuts against the groove wall of at least a portion of the protective groove 12. This facilitates a stable connection with the connecting shaft 20.

[0046] In other embodiments, some of the fixing components 50 may also be bolt structures.

[0047] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A Mecanum wheel, characterized in that, include: Wheel hub assembly (10); A plurality of connecting shafts (20) are distributed at intervals along the circumference of the hub assembly (10), and the axis of the connecting shaft (20) intersects the axis of the hub assembly (10). Each connecting shaft (20) is provided with a plurality of bushings (21) at intervals. The roller assembly (30) is sleeved on the bushing (21) on each of the connecting shafts (20), and the two ends of the roller assembly (30) extend beyond the corresponding bushing (21) along its own axis. The sealing assembly (40) is fitted onto both ends of each connecting shaft (20) along its own axial direction and is sealed to the end of the roller assembly (30). Each of the sealing components (40) includes an end cap (41) and a sealing body (42) disposed on the end cap (41). The end cap (41) is sleeved on the connecting shaft (20) and abuts against the end of the roller assembly (30). The sealing body (42) includes an annular frame (421) and a sealing sleeve (423) sleeved on the outer surface of the annular frame (421). The annular frame (421) and the sealing sleeve (423) are both located between the end of the roller assembly (30) and the connecting shaft (20), and both abut against the bushing (21). The surface of the sealing sleeve (423) facing away from the annular frame (421) seals against the inner side of the roller assembly (30).

2. A Mecanum wheel according to claim 1, characterized in that, The end cap (41) includes a cap body (412) and an annular protrusion (411) protruding from the cap body (412). The cap body (412) and the annular protrusion (411) are both sleeved on the connecting shaft (20), and the annular protrusion (411) is located between the end of the connecting shaft (20) and the end of the roller assembly (30). The annular frame (421) is sleeved on the annular protrusion (411).

3. A Mecanum wheel according to claim 1, characterized in that, The outer surface of the ring frame (421) is provided with a mounting groove (422), which is arranged in a ring around the circumference of the ring frame (421), and the bushing (21) is disposed in the mounting groove (422).

4. A Mecanum wheel according to any one of claims 1-3, characterized in that, The Mecanum wheel also includes a fixing component (50), and the hub assembly (10) includes two hub pieces (11) connected to each other in the middle, with both ends of each connecting shaft (20) fixed to the two hub pieces (11) by the fixing component (50).

5. A Mecanum wheel according to claim 4, characterized in that, The two hub components (11) are provided with protective grooves (12) on their opposite surfaces. At least a portion of the protective grooves (12) are provided with mounting holes (13). The fixing component (50) is located in at least a portion of the protective grooves (12) and is connected to the connecting shaft (20) through the mounting holes (13).

6. A Mecanum wheel according to claim 5, characterized in that, At least part of the protective groove (12) has a groove wall including a protective wall (121) and a bottom wall (122). The protective wall (121) extends along the axial direction of the connecting shaft (20) and extends beyond the fixing member (50). The bottom wall (122) extends to the surface of the hub member (11) in a direction intersecting with the connecting shaft (20). The mounting hole (13) is provided on the bottom wall (122).

7. A Mecanum wheel according to claim 6, characterized in that, The bottom wall (122) is provided with an anti-rotation protrusion (123), which is located on the outer periphery of the mounting hole (13). The fixing component (50) is provided with a mating part (53) that cooperates with the anti-rotation protrusion (123).

8. A Mecanum wheel according to claim 5, characterized in that, At least a portion of the fixing component (50) includes a flange portion (51) and a connecting portion (52) disposed on the surface of the flange portion (51). The connecting portion (52) passes through the mounting hole (13) and is connected to the connecting shaft (20). The flange portion (51) abuts against the groove wall of at least a portion of the protective groove (12).

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