Omnidirectional wheel of mower

Abstract

The utility model provides an omnidirectional wheel of a mower, and relates to the technical field of omnidirectional wheels. The device is mounted on a head of the mower, and comprises a wheel bracket, a driving device, a driving device and a driving device, and the wheel bracket is rotatably connected to the head; the outer diameter of each first roller is larger than that of each second roller, the first rollers and the second rollers are alternately and rotationally connected to the wheel support, and the plane where the centers of the second rollers are located is located on the side, away from the vehicle head, of the plane where the centers of the first rollers are located. And the outer contour lines of the plurality of second rollers are internally tangent to the outer contour lines of the plurality of first rollers. The steering resistance on soft road surfaces such as grassland can be reduced, the obstacle crossing ability is enhanced, the balancing effect can be achieved, and the influence on the small roller supporting effect caused by the change of the included angle between the omni-directional wheel and the ground during movement is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of omnidirectional wheels, in particular to an omnidirectional wheel for a lawn mower. Background Art

[0002] Omnidirectional wheels are capable of moving in multiple directions. They typically consist of a central wheel surrounded by multiple smaller rollers. These smaller rollers can be independently controlled, allowing the wheel to move at any angle. Omnidirectional wheels are designed for use on lawns. However, on commercially available omnidirectional wheels, the outer contour tangents of the large and small rollers lie on the central plane. As the angle between the large and small rollers increases, the smaller rollers become less effective, affecting their ability to overcome obstacles.

[0003] Therefore, there is an urgent need for an omnidirectional wheel for a lawn mower that can balance the size of the rollers and improve the obstacle-crossing capability. Utility Model Content

[0004] The purpose of the present invention is to provide an omnidirectional wheel for a lawn mower, which solves the technical problem of the smaller rollers in the prior art. The various technical effects of the preferred technical solution among the various technical solutions provided by the present invention are described in detail below.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The utility model provides an omnidirectional wheel for a lawn mower, which is installed on the head of the lawn mower and includes:

[0007] A wheel bracket, the wheel bracket being rotatably connected to the vehicle head;

[0008] The first roller and the second roller, the outer diameter of the first roller is larger than the outer diameter of the second roller, a plurality of the first rollers and a plurality of the second rollers are connected to the wheel bracket for alternating rotation, the surface where the centers of the plurality of the second rollers are located is located on the side of the surface where the centers of the plurality of the first rollers are located away from the front of the vehicle, and the outer contour lines of the plurality of the second rollers are inscribed in the outer contour lines of the plurality of the first rollers.

[0009] Preferably, it also includes:

[0010] The first contour line and the second contour line, the outer contour lines of some of the first rollers are the first contour lines, the outer contour lines of some of the second rollers are the second contour lines, and the second contour lines are inscribed in the first contour line.

[0011] Preferably, it also includes:

[0012] The first reference plane and the second reference plane, the plane where the centers of the first rollers are located is the first reference plane, the plane where the centers of the second rollers are located is the second reference plane, and the second reference plane is located on the side of the first reference plane away from the vehicle head.

[0013] Preferably, the wheel bracket includes:

[0014] A roller bracket, the roller bracket being rotatably connected to the vehicle head;

[0015] A clamping plate is detachably connected to the roller bracket coaxially, and the first roller and the second roller are respectively rotatably connected between the roller bracket and the clamping plate.

[0016] Preferably, the clamping plate and the roller bracket are fixedly connected by bolts.

[0017] Preferably, it also includes:

[0018] a first U-shaped opening, wherein a plurality of the first U-shaped openings are equidistantly arranged on the roller bracket and the clamping plate, and the first roller is located in the first U-shaped opening;

[0019] A second U-shaped opening, wherein a plurality of the second U-shaped openings are equidistantly arranged on the roller bracket and the clamping plate, and are alternately arranged with the plurality of the first U-shaped openings, and the second roller is located in the second U-shaped opening.

[0020] Preferably, it also includes:

[0021] A fixed shaft, the fixed shaft being rotatably connected to the vehicle head;

[0022] A connecting plate, wherein the first end of the connecting plate is fixedly connected to the end of the fixed shaft away from the vehicle head and is tilted between the fixed shaft, and the roller bracket is rotatably connected to the second end of the connecting plate.

[0023] Preferably, it also includes:

[0024] A bearing is installed at the rotation connection between the fixed shaft and the roller bracket.

[0025] In the technical solution provided by the present invention, all the first rollers and all the second rollers are arranged alternately and are not coplanar, and the outer contours of the plurality of second rollers are inscribed in the outer contours of the plurality of first rollers. This arrangement is beneficial for reducing steering resistance on soft roads such as grass, enhancing obstacle crossing ability, playing a balancing role, and reducing the influence of the angle change between the omnidirectional wheel and the ground during movement on the supporting effect of the small roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a schematic diagram of the connection between the omnidirectional wheel, the connecting plate and the fixed shaft of the utility model;

[0028] Figure 2 This is an exploded schematic diagram of the omnidirectional wheel of the utility model;

[0029] Figure 3 This is a radial schematic diagram of the omnidirectional wheel of the utility model;

[0030] Figure 4 It is a schematic diagram of the outer contours of the first roller and the second roller of the utility model.

[0031] In the figure, 1-roller bracket; 2-clamping pressure plate; 3-first roller; 4-second roller; 5-first U-shaped opening; 6-second U-shaped opening; 7-first reference plane; 8-second reference plane; 9-first contour line; 10-second contour line; 11-fixed shaft; 12-connecting plate. DETAILED DESCRIPTION

[0032] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0033] refer to Figure 1-4 The specific embodiment of the utility model provides an omnidirectional wheel for a lawn mower, which is installed on the head of the lawn mower and includes:

[0034] A wheel bracket, the wheel bracket is rotatably connected to the front of the vehicle;

[0035] The first roller 3 and the second roller 4, the outer diameter of the first roller 3 is larger than the outer diameter of the second roller 4, a plurality of first rollers 3 and a plurality of second rollers 4 are connected to the wheel bracket for alternating rotation, the surface where the centers of the plurality of second rollers 4 are located is located on the side away from the front of the vehicle from the surface where the centers of the plurality of first rollers 3 are located, and the outer contour lines of the plurality of second rollers 4 are inscribed in the outer contour lines of the plurality of first rollers 3.

[0036] On commercially available omnidirectional wheels, the outer contour tangents of the large and small rollers lie on the center plane, resulting in the smaller roller's support function becoming increasingly weaker as the angle between the large and small rollers increases. In this application, all first rollers 3 and all second rollers 4 are arranged alternately and non-coplanarly, with the outer contours of several second rollers 4 inscribed within the outer contours of several first rollers 3. This arrangement helps reduce steering resistance on soft surfaces such as grass, enhances obstacle crossing capabilities, and provides a balancing effect, minimizing the impact of changes in the angle between the omnidirectional wheel and the ground on the support function of the smaller rollers during movement.

[0037] Further optimization plans also include:

[0038] The first contour line 9 and the second contour line 10 , the outer contour lines of the first rollers 3 are the first contour line 9 , the outer contour lines of the second rollers 4 are the second contour line 10 , and the second contour line 10 is inscribed in the first contour line 9 .

[0039] like Figure 4 As shown, the outer contours of the plurality of second rollers 4 are inscribed in the outer contours of the plurality of first rollers 3, with the tangent points being on the sides of the first contour 9 and the second contour 10. This arrangement effectively enlarges the diameter of the omnidirectional wheel and enhances its obstacle-crossing capability.

[0040] Further optimization plans also include:

[0041] The first reference plane 7 and the second reference plane 8 are located on the plane where the centers of the first rollers 3 are located, and the plane where the centers of the second rollers 4 are located is the second reference plane 8. The second reference plane 8 is located on the side of the first reference plane 7 away from the vehicle front.

[0042] The first reference plane 7 and the second reference plane 8 are not arranged coplanarly, so that the second contour line 10 can be inscribed in the first contour line 9, thereby balancing the forces of the large and small rollers and effectively improving the load-bearing capacity of the omnidirectional wheel.

[0043] Further optimization scheme, the wheel bracket includes:

[0044] The roller bracket 1 is rotatably connected to the vehicle head;

[0045] The clamping plate 2 is detachably connected to the roller bracket 1 coaxially, and the first roller 3 and the second roller 4 are respectively rotatably connected between the roller bracket 1 and the clamping plate 2. The clamping plate 2 and the roller bracket 1 are fixedly connected by bolts.

[0046] The clamping plate 2 and the roller bracket 1 are detachably connected. The roller is directly placed between the clamping plate 2 and the roller bracket 1, and then the clamping plate 2 and the roller bracket 1 are fixed, which greatly reduces the complexity and time of roller assembly, thereby greatly reducing the roller assembly cost.

[0047] Further optimization plans also include:

[0048] A first U-shaped opening 5, wherein a plurality of first U-shaped openings 5 ​​are equidistantly provided on the roller bracket 1 and the clamping plate 2, and the first roller 3 is located in the first U-shaped opening 5;

[0049] The second U-shaped openings 6 are equidistantly provided on the roller bracket 1 and the clamping plate 2 and are alternately arranged with the first U-shaped openings 5 ​​. The second roller 4 is located in the second U-shaped openings 6 .

[0050] Further optimization plans also include:

[0051] A fixed shaft 11 is rotatably connected to the vehicle head;

[0052] The connecting plate 12 has a first end fixedly connected to the end of the fixed shaft 11 away from the front of the vehicle, and is tilted relative to the fixed shaft 11. The roller bracket 1 is rotatably connected to the second end of the connecting plate 12, and the axis of the fixed shaft 11 is also tilted relative to the axis of the roller bracket 1. When the fixed shaft 11 is driven to rotate, the axis of the omnidirectional wheel will rotate around the axis of the fixed shaft 11, and the omnidirectional wheel will rotate toward the ground, thereby pushing the front of the vehicle to rise.

[0053] Further optimization plans also include:

[0054] Bearings (not marked in the figure) are installed at the rotational connection between the fixed shaft 11 and the roller bracket 1. They effectively improve the rotational stability between the fixed shaft 11 and the roller bracket 1.

[0055] The tangent line of the roller's outer contour on the omnidirectional wheels on the market lies on the center plane, resulting in the small roller's supporting effect becoming increasingly smaller as the angle between the omnidirectional wheel and the ground changes. The rollers on the omnidirectional wheels on the market all have the same diameter, resulting in small roller diameters for omnidirectional wheels with the same outer diameter and number of rollers, which in turn results in low load-bearing capacity and poor ability to overcome obstacles. The rollers on the omnidirectional wheels on the market are often manufactured using a two-stage injection molding process, which is not only complex but also time- and process-intensive. The rollers on the omnidirectional wheels on the market are installed on the roller bracket one by one using bolts or interference fit. The assembly process is time-consuming and labor-intensive, resulting in high assembly costs.

[0056] In this application, only the roller and fixed shaft 11 need to be manufactured separately, and then the fixed shaft 11 is passed through the center hole of the roller. The production process only requires one injection molding and one clamping ordinary lathe operation. With a large number of off-the-shelf products available for selection, the production complexity of the roller and other components is greatly reduced, thereby significantly reducing the production cost of the roller components.

[0057] Working conditions: The fixed shaft 11 is rotatably connected to the front of the vehicle, and the omnidirectional wheel can only rotate around the axis. When in use, force is applied to the circumference of the fixed shaft 11, so that the fixed shaft 11 rotates and swings downward around the axis with the omnidirectional wheel, thereby pushing the front of the vehicle upward.

[0058] Since the rotation axis of the omnidirectional wheel is not parallel to the axis of the fixed shaft 11, the movement process will cause the omnidirectional wheel to generate a changing angle with the ground.

[0059] It should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like used herein to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are intended only to facilitate the description of this application and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] It should also be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0061] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An omnidirectional wheel for a lawn mower, mounted on the front of the lawn mower, characterized in that: include: A wheel bracket, the wheel bracket being rotatably connected to the vehicle head; A first roller (3) and a second roller (4), wherein the outer diameter of the first roller (3) is larger than the outer diameter of the second roller (4), a plurality of the first rollers (3) and a plurality of the second rollers (4) are connected to the wheel bracket in an alternating manner, the surface where the centers of the plurality of the second rollers (4) are located is located on the side of the surface where the centers of the plurality of the first rollers (3) are located away from the front of the vehicle, and the outer contour lines of the plurality of the second rollers (4) are inscribed in the outer contour lines of the plurality of the first rollers (3).

2. The omnidirectional wheel of the lawn mower according to claim 1, characterized in that: Also includes: A first contour line (9) and a second contour line (10), the outer contour lines of several of the first rollers (3) are the first contour lines (9), the outer contour lines of several of the second rollers (4) are the second contour lines (10), and the second contour line (10) is inscribed in the first contour line (9).

3. The omnidirectional wheel of the lawn mower according to claim 1, characterized in that: Also includes: A first reference plane (7) and a second reference plane (8), the plane where the centers of the first rollers (3) are located is the first reference plane (7), the plane where the centers of the second rollers (4) are located is the second reference plane (8), and the second reference plane (8) is located on the side of the first reference plane (7) away from the vehicle head.

4. The omnidirectional wheel of the lawn mower according to claim 1, characterized in that The wheel bracket comprises: A roller bracket (1), the roller bracket (1) being rotatably connected to the vehicle head; A clamping plate (2) is detachably connected to the roller bracket (1) coaxially, and the first roller (3) and the second roller (4) are rotatably connected between the roller bracket (1) and the clamping plate (2).

5. The omnidirectional wheel of the lawn mower according to claim 4, characterized in that: The clamping plate (2) and the roller bracket (1) are fixedly connected via bolts.

6. The omnidirectional wheel of a lawn mower according to claim 4, characterized in that Also includes: a first U-shaped opening (5), wherein a plurality of the first U-shaped openings (5) are equidistantly arranged on the roller bracket (1) and the clamping plate (2), and the first roller (3) is located in the first U-shaped opening (5); A second U-shaped opening (6), wherein a plurality of the second U-shaped openings (6) are equidistantly arranged on the roller bracket (1) and the clamping plate (2), and are alternately arranged with a plurality of the first U-shaped openings (5), and the second roller (4) is located in the second U-shaped opening (6).

7. The omnidirectional wheel of a lawn mower according to claim 4, characterized in that Also includes: A fixed shaft (11), the fixed shaft (11) being rotatably connected to the vehicle head; A connecting plate (12), wherein a first end of the connecting plate (12) is fixedly connected to an end of the fixed shaft (11) away from the vehicle head and is tilted between the fixed shaft (11), and the roller bracket (1) is rotatably connected to the second end of the connecting plate (12).

8. The omnidirectional wheel of a lawn mower according to claim 7, characterized in that: Also includes: A bearing is installed at the rotation connection between the fixed shaft (11) and the roller bracket (1).

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