CN216507708U

CN216507708U - Rotating wheel, omnidirectional wheel and mower

Info

Publication number: CN216507708U
Application number: CN202123110435.6U
Authority: CN
Inventors: 王雷; 陈熙
Original assignee: Ecoflow Technology Ltd
Current assignee: Ecoflow Technology Ltd
Priority date: 2021-12-11
Filing date: 2021-12-11
Publication date: 2022-05-13
Anticipated expiration: 2031-12-11

Abstract

The utility model discloses a rotating wheel, an omnidirectional wheel and a mower. The rotating wheel comprises a connecting piece, a roller, a bearing and a fixing piece, and a pin shaft is arranged on the connecting piece in a protruding mode; the roller is sleeved on the pin shaft, and a convex part is arranged on the inner side wall of the roller; the bearing is sleeved on the pin shaft and is abutted against one side of the protruding part, which is far away from the connecting piece, and the bearing comprises an inner ring, an outer ring and a ball arranged between the inner ring and the outer ring; the fixing piece is abutted to one side of the inner ring and the outer ring of the bearing, which is deviated from the bulge. The rotating wheel provided by the utility model is simultaneously abutted to the inner ring and the outer ring of the bearing through the fixing piece, and the bearing can be fastened in the wheel cavity, so that the reliability and the connection strength of the rotary connection of the connecting piece and the roller are improved. And because the contact area of the roller and the bearing is smaller, the friction acting force of the bearing to the roller can be reduced, and the rotation flexibility of the roller is further improved.

Description

Rotating wheel, omnidirectional wheel and mower

[ technical field ] A

The utility model relates to the technical field of garden tools, in particular to a rotating wheel, an omnidirectional wheel and a mower.

[ background of the utility model ]

The connection mode of the wheel disc and each roller of the existing omnidirectional wheel is that each roller is generally arranged on the periphery of the wheel disc, and the wheel disc is rotatably connected with one end of each roller through a connecting piece. So when the omniwheel bore the heavy load, the junction of connecting piece and gyro wheel often can buckle and become invalid because of bearing the moment of coming from the gyro wheel other end too big, and strengthen the connection structure of gyro wheel and connecting piece, often can lead to the rotation flexibility of gyro wheel to descend again.

Therefore, there is a need for an improved rotating wheel to avoid the above-mentioned drawbacks.

[ Utility model ] content

An object of an embodiment of the present invention is to provide a rotating wheel, an omni-directional wheel, and a lawn mower, in which the rotating wheel not only enables a roller to have better rotation flexibility, but also improves the connection reliability between the roller and a connecting member.

The technical scheme of the utility model is as follows:

in a first aspect, a rotatable wheel is provided that includes a connector, a roller, a bearing, and a fastener. The connecting piece is provided with a pin shaft in a protruding mode, the roller is sleeved on the pin shaft, a protruding portion is arranged on the inner side wall of the roller, the inner ring of the bearing is sleeved on the pin shaft, the outer ring of the bearing is abutted to one side, deviating from the connecting piece, of the protruding portion, and the fixing piece is abutted to one side, deviating from the protruding portion, of the inner ring and the outer ring of the bearing.

The embodiment of the utility model at least has the following beneficial effects: the rotating wheel provided by the embodiment of the application comprises a connecting piece, a roller, a bearing and a fixing piece. Wherein the roller can be rotated relative to the connecting member by means of a bearing. And through making the mounting butt in the inner circle and the outer lane of bearing simultaneously, then can avoid the inner circle and the outer lane department of bearing to produce like this and rock, so, through the mounting butt in the inner circle and the outer lane of bearing simultaneously, can fasten the bearing in the wheel chamber to improve the reliability and the joint strength that connecting piece and gyro wheel rotate to be connected. And because the contact area of the roller and the bearing is smaller, the friction acting force of the bearing to the roller can be reduced, and the rotation flexibility of the roller is further improved.

Optionally, the fixing member includes a first fixing member and a second fixing member, the first fixing member is connected to the pin shaft and abuts against one side of the inner ring of the bearing, which is away from the protruding portion, and the second fixing member is connected to the roller and abuts against one side of the outer ring of the bearing, which is away from the protruding portion.

Optionally, first mounting and second mounting all are the ring form setting, and the mounting still includes first pin and a plurality of second pin, and first pin sets up with the round pin axle is coaxial and is connected in the round pin axle, and the nut butt of first pin is in the one side that first mounting deviates from the inner circle of bearing, and a plurality of second pins set up along the circumference of second mounting, and second pin connection is in the gyro wheel to the butt deviates from one side of the outer lane of bearing in the second mounting.

Optionally, a reinforcing member is disposed on the connecting member, and the reinforcing member and the pin shaft are disposed on two opposite surfaces of the connecting member.

Optionally, the outer side wall of the roller is provided with a plurality of anti-slip ribs, and the plurality of anti-slip ribs are arranged along the axial direction of the roller at intervals in parallel.

Optionally, the roller is a conical wheel, and the diameter of one side of the roller close to the connecting piece is larger than that of one side of the roller far away from the connecting piece.

The second aspect provides an omniwheel, and it includes rim plate and foretell rotation wheel, and the quantity of rotating the wheel has a plurality ofly, and a plurality of rotations wheel is connected in the rim plate to set up around the circumference interval in the rim plate.

The omnidirectional wheel provided by the embodiment of the application comprises the rotating wheel, and the rotating wheel has better rotating flexibility and structural reliability, so that the rotating flexibility and the structural reliability of the omnidirectional wheel are also improved.

Optionally, a plurality of spaced clamping grooves are formed in the wheel disc, a limiting block is arranged at the end, away from the pin shaft, of the connecting piece of the rotating wheel, and the limiting block is limited in the clamping grooves.

Optionally, the omni wheel comprises a motor, the motor shaft of which is connected to the central shaft of the wheel disc.

In a third aspect, a lawn mower is provided, which comprises a machine body and the omnidirectional wheel, wherein the omnidirectional wheel is connected to the machine body.

The mower provided by the embodiment of the application comprises the omnidirectional wheel, and the omnidirectional wheel has better rotation flexibility and structural reliability, so that the driving flexibility and the structural reliability of the mower are also improved.

[ description of the drawings ]

FIG. 1 is a schematic perspective view of a rotating wheel according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of the rotating wheel of FIG. 1;

FIG. 3 is an enlarged, fragmentary, schematic view taken within the dashed outline of FIG. 2;

FIG. 4 is a perspective view of an omni wheel in another embodiment of the present application;

FIG. 5 is a cross-sectional structural schematic view of the omni wheel of FIG. 4;

figure 6 is a schematic perspective view of another angle of the omni wheel shown in figure 4;

fig. 7 is a schematic perspective view of an omni wheel according to another embodiment of the present application;

fig. 8 is a schematic perspective view of the wheel and motor combination.

Description of the main element symbols:

10-rotating wheel 11-connecting piece 112-pin shaft

114-stopper 12-roller 121-projection

122-wheel cavity 123-sink groove 13-bearing

132-inner race 134-outer race 136-balls

14-fastener 141-first fastener 142-second fastener

143-first pin 144-bolt 145-nut

146-assembly hole 15-reinforcement 16-anti-slip rib

100-Omnidirectional wheel 20-wheel disc 21-center hole

22-shaft hole 23-clamping groove 30-motor

40-rolling bearing.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Therefore, the embodiment of the utility model provides the rotating wheel, the rotating wheel not only can enable the roller to have better rotating flexibility, but also has better connection reliability between the roller and the connecting piece.

Specifically, the rotating wheel of this application can be connected on the omniwheel to realize omnidirectional rotation, and can connect the omniwheel in devices such as lawn mower.

As shown in fig. 1 and 2, fig. 1 is a schematic perspective view of a rotating wheel 10 in an embodiment of the present application, and fig. 2 is a schematic cross-sectional view of the rotating wheel 10 in fig. 1. The rotary wheel 10 includes a connection member 11, a roller 12, a bearing 13, and a fixing member 14.

The connecting element 11 is provided with a pin shaft 112 in a protruding manner, the roller 12 is sleeved on the pin shaft 112, the inner side wall of the roller 12 is provided with a protrusion 121, the bearing 13 is sleeved on the pin shaft 112, the bearing 13 abuts against one side of the protrusion 121 departing from the connecting element 11, the inner ring 132 of the bearing 13 is sleeved on the pin shaft 112, the outer ring 134 of the bearing 13 abuts against one side of the protrusion 121 departing from the connecting element 11, and the fixing element 14 abuts against one side of the inner ring 132 and the outer ring 134 of the bearing 13 departing from the protrusion 121.

Alternatively, as shown in fig. 2, the bearing 13 in the present embodiment may be a rolling bearing, specifically, the bearing 13 may adopt a currently-used bearing 13, and structurally and approximately include an inner ring 132 and an outer ring 134 capable of rotating relatively and balls 136 interposed between the inner ring 132 and the outer ring 134, so that the friction force generated by the rotation of the inner ring 132 and the outer ring 134 may be reduced.

As shown in fig. 1 and 2, the connecting member 11 may be configured in a flat plate shape, the main surface of one side of the connecting member 11 is provided with a protruding pin 112, the main surface of the connecting member 11 refers to a surface with a larger area on the connecting member 11, the pin 112 is configured in a circular shape, and an axis of the pin 112 is perpendicular to the main surface of the connecting member 11, so that the roller 12 disposed on the pin 112 can be prevented from interfering with the connecting member 11.

As shown in fig. 2, the roller 12 in this embodiment is a hollow roller, and the hollow roller is disposed in a hollow manner, so that on one hand, the bearing 13 and the fixing member 14 can be accommodated in the hollow roller, so that the connection between the roller 12 and the connecting member 11 is more compact, and on the other hand, the weight of the roller 12 can also be reduced.

Specifically, a wheel cavity 122 is disposed inside the roller 12, a protrusion 121 protrudes from an inner side wall of the wheel cavity 122, the protrusion 121 may be disposed in a continuous ring shape, or may include a plurality of spaced protrusions 121, and the plurality of protrusions 121 are disposed at even intervals around the circumference of the wheel cavity 122. Wherein, the extending direction of the convex part 121 is vertical to the axial direction of the roller 12. The pin shaft 112 is inserted into an area surrounded by the protrusion 121.

The bearing 13 is disposed in the wheel cavity 122 and located on a side of the protrusion 121 away from the connecting member 11, and is used for positioning and limiting the protrusion 121 in a space between the bearing 13 and the connecting member 11, so as to prevent the roller 12 from shaking along the axis direction of the pin 112.

Optionally, as shown in fig. 2, a sunken groove 123 is provided on a side of the protrusion 121 facing away from the connecting member 11, and the bearing 13 is sunken in the sunken groove 123 to reduce a protruding height of the bearing 13 relative to the protrusion 121, so as to facilitate fixing of the bearing 13 by the fixing member 14.

Specifically, the depth of the sunken groove 123 may be slightly greater than or equal to the length of the bearing 13 in the radial direction, and when the bearing 13 is sunken in the sunken groove 123, the surface of the bearing 13 is flush with the surface of the protrusion 121, or the surface of the bearing 13 is lower than the surface of the protrusion 121, so that the bearing 13 may be completely accommodated in the sunken groove 123, so as to reduce the space occupied by the bearing 13, and facilitate the limit of the bearing 13 by using the fixing member 14.

Further, as shown in fig. 2 and fig. 3, the fixing element 14 is disposed on a side of the bearing 13 away from the protrusion 121, and is used for positioning and limiting the bearing 13 on the pin 112, so as to prevent the bearing 13 from shaking along the axial direction of the pin 112.

The fixing member 14 in the embodiment of the present application not only abuts against the inner ring 132 of the bearing 13, and prevents the inner ring 132 from shaking, but also abuts against the outer ring 134 of the bearing 13 at the same time, and further prevents the outer ring 134 from shaking, so that the fixing member 14 abuts against the inner ring 132 and the outer ring 134 of the bearing 13 at the same time, and the bearing 13 can be fastened in the wheel cavity 122, thereby improving the reliability and the connection strength of the rotational connection between the connecting member 11 and the roller 12. And because the contact area between the roller 12 and the bearing 13 is small, the friction acting force of the bearing 13 on the roller 12 can be reduced, and the rotation flexibility of the roller 12 is improved.

As shown in fig. 2 and 3, the fixing member 14 includes a first fixing member 141 and a second fixing member 142, the first fixing member 141 is connected to the pin 112 and abuts against a side of the inner ring 132 away from the protrusion 121, and the second fixing member 142 is connected to the roller 12 and abuts against a side of the outer ring 134 away from the protrusion 121.

Specifically, a projection of the first fixing element 141 on the plane of the bearing 13 at least partially overlaps with the inner ring 132 of the bearing 13, so that when the first fixing element 141 is connected to the pin 112, at least a portion of the first fixing element 141 is pressed against the inner ring 132 of the bearing 13 to limit the inner ring 132 of the bearing 13.

It can be understood that the projection of the second fixing member 142 on the plane of the bearing 13 at least partially overlaps with the outer ring 134 of the bearing 13, so that when the second fixing member 142 is connected to the roller 12, at least a portion of the second fixing member 142 will be pressed against the outer ring 134 of the bearing 13 to limit the outer ring 134 of the bearing 13.

In summary, when the roller 12 rotates, the first fixing element 141 is always fixedly connected to the pin 112, so that the inner ring 132 of the bearing 13 can be limited. The second fixing member 142 is connected to the roller 12 and rotates synchronously with the roller 12, but when the roller 12 rotates, the second fixing member 142 can prevent the outer ring 134 of the bearing 13 from moving, and the inner ring 132 and the outer ring 134 of the bearing 13 can be simultaneously restrained by the fixing member 14 regardless of whether the roller 12 is in a stationary or rotating state.

In this embodiment, the first fixing element 141 and the second fixing element 142 are both arranged in a circular ring shape, the fixing element 14 further includes a first pin 143 and a plurality of second pins, the first pin 143 is coaxially arranged with the pin 112 and connected to the pin 112, a nut of the first pin 143 abuts against a side of the first fixing element 141 departing from the inner ring 132, the first pin 143 connected to the pin 112 is arranged, the nut of the pin can be directly abutted against the first fixing element 141, and therefore the connection structure of the first fixing element 141 and the pin 112 is simplified.

The second fixing member 142 and the first fixing member 141 are coaxially disposed, the second fixing member 142 and the first fixing member 141 are nested at an interval, a plurality of second pins are disposed along the circumference of the second fixing member 142, the second pins are connected to the roller 12, and nuts of the second pins abut against a side of the second fixing member 142 away from the outer ring 134. In this way, the second fixing element 142 may be connected to the roller 12, and when the roller 12 rotates relative to the pin 112, the second fixing element 142 may limit the bearing 13.

Optionally, the second fixing elements 142 may further include a plurality of second fixing elements 142 arranged at intervals, the plurality of second fixing elements 142 are arranged around the circumference of the pin shaft 112 at even intervals, and each second fixing element 142 is connected to the roller 12 through a second pin, so that the contact area between the second fixing element 142 and the bearing 13 can be reduced while the limiting effect of the second fixing element 142 is ensured, and the flexibility of rotation of the roller 12 is improved.

Alternatively, the second fixing member 142 may be fixed by a bolt 144 and a nut 145 which are engaged with each other. Specifically, a bolt 144 is inserted through the side of the wheel cavity 122 of the roller 12, where the protrusion 121 is located, near the connecting member 11, a mounting hole 146 is formed in the side of the protrusion 121 facing the connecting member 11, and a nut 145 is disposed in the mounting hole 146 and is in threaded connection with the bolt 144. By providing the bolt 144 and the nut 145 which are engaged with each other, the thickness of the protrusion 121 in the axial direction of the roller 12 can be further reduced while ensuring the coupling strength of the second fixing member 142 to the roller 12.

Further, as shown in fig. 1 and 2, the connecting member 11 is provided with a reinforcing member 15, and the reinforcing member 15 and the pin 112 are provided on two opposite surfaces of the connecting member 11.

Specifically, the reinforcing member 15 is disposed on the other main surface of the connecting member 11, and when the joint between the roller 12 and the connecting member 11 receives a large moment from the other end of the roller 12, the reinforcing member 15 can effectively support the head end of the roller 12, and can also reinforce the overall structural strength of the connecting member 11, thereby preventing the connecting member 11 from breaking or bending.

Wherein, the reinforcing member 15 may be disposed in a rib shape and may be integrally formed with the connecting member 11. The ribs can be rectangular ribs, triangular ribs shown in fig. 2 and trapezoidal ribs, so that the bearing capacity of the ribs is further improved.

Alternatively, the reinforcing member 15 may be provided in the middle of the connecting member 11 to reinforce the strength of the middle of the connecting member 11, thereby preventing the middle of the connecting member 11 from being weak and from being broken when the end portions are subjected to a large force.

Further, as shown in fig. 1 and 2, a plurality of anti-slip ribs 16 are provided on an outer side wall of the roller 12, and the plurality of anti-slip ribs 16 are arranged in parallel at intervals along an axial direction of the roller 12.

Specifically, the plurality of anti-slip ribs 16 are arranged in a continuous ring shape and are protrudingly arranged on the outer side wall of the roller 12, and the friction force between the roller 12 and the contact surface can be improved by arranging the anti-slip ribs 16.

Alternatively, the plurality of cleats 16 in this embodiment are spaced apart in parallel and the plane of the cleats 16 is perpendicular to the axis of the roller 12 to form a rectangular-like cleat 16.

Alternatively, a plurality of the nonskid beads 16 may be arranged at a parallel interval, but the plane of the nonskid beads 16 may be inclined with respect to the axial direction of the roller 12, so that the nonskid beads 16 may be formed substantially in a spiral shape.

As shown in fig. 1 and 2, the roller 12 is a conical roller, and the diameter of the roller 12 near the connecting member 11 is larger than the diameter of the roller 12 away from the connecting member 11. In this way, the stress on the end of the roller 12 away from the connecting member 11 can be reduced, and the connection stability of the roller 12 and the pin 112 can be improved.

As shown in fig. 4, fig. 4 is a schematic perspective view of an omnidirectional wheel 100 in another embodiment of the present application. Based on the rotating wheel 10 in the above embodiment, the present application further provides an omnidirectional wheel 100, where the omnidirectional wheel 100 includes a wheel disc 20 and a plurality of rotating wheels 10, and the plurality of rotating wheels 10 are connected to the wheel disc 20 and are circumferentially spaced around the wheel disc 20.

Specifically, the wheel disc 20 is a disk-shaped structure, the connecting members 11 of the plurality of rotating wheels 10 are connected to the outer periphery of the wheel disc 20, and the rollers 12 of the plurality of rotating wheels 10 are located on the same side of the connecting members 11, that is, the wheel disc 20 is rotatably connected to the same side of each roller 12 through the connecting members 11.

In this embodiment, the plurality of rotating wheels 10 are annularly disposed on the outer circumference of the wheel disc 20 in a single row, so as to reduce the manufacturing cost of the omni wheel 100.

Further, the ratio of the diameter of roller 12 to the diameter of wheel disc 20 may be selectively set to improve the passing of omni wheel 100.

Further, as shown in fig. 5, fig. 5 is a cross-sectional structural view of the omni wheel 100 in fig. 4. A plurality of spaced clamping grooves 23 are formed in the wheel disc 20, a limiting block 114 is arranged at the end of the connecting piece 11 of the rotating wheel 10, which is far away from the pin shaft 112, and the limiting block 114 is limited in the clamping grooves 23.

Particularly, be equipped with 10 clamp grooves 23 on rim plate 20's the circumference in this embodiment, stopper 114 that connecting piece 11 deviates from gyro wheel 12 tip is spacing in clamp groove 23 to with connecting piece 11 and rim plate 20 fixed connection, be connected connecting piece 11 and rim plate 20 through adopting the mode of establishing of inlaying, can reduce the complexity that connecting piece 11 and rim plate 20 are connected, and can promote the assembly efficiency of connecting piece 11 and rim plate 20.

In a particular embodiment, wheel disc 20 may include a first wheel disc and a second wheel disc, each having a retaining groove formed in a surface thereof adjacent to each other. Wherein, the shape of the limiting groove shown in fig. 5 is a sinking platform type, the limiting block 114 at the end of the connecting element 11 is accommodated in the first limiting groove with a larger cross-sectional dimension, and the part of the connecting element 11 connected to the limiting block 114 is accommodated in the second limiting groove with a smaller cross-sectional dimension, so that the limiting block 114 can be limited in the clamping groove 23 by the step formed at the juncture of the first limiting groove and the second limiting groove, and the fixing of the connecting element 11 and the wheel disc 20 is realized.

As shown in fig. 4 and 6, fig. 6 is a schematic perspective view of wheel disc 20 and the motor. Omni wheel 100 includes a motor 30, and motor 30 is connected to wheel disc 20 for driving wheel disc 20 to rotate.

Specifically, be equipped with centre bore 21 at the center of rim plate 20, omni wheel 100 includes motor 30, and motor 30 can be the in-wheel motor, and the in-wheel motor sets up in centre bore 21 to make in-wheel motor and rim plate 20 be the setting of an organic whole structure, be convenient for omni wheel 100's installation.

Alternatively, in another embodiment, as shown in fig. 7 and 8, the center of the wheel disc 20 may be provided with a shaft hole 22, a rolling bearing 40 is disposed in the shaft hole 22, the motor 30 may be a direct drive motor, and a motor shaft of the direct drive motor is inserted into the rolling bearing 40 to form a direct drive structure based on the omni wheel 100.

Alternatively, the motor 30 may be a conventional motor 30 capable of driving rotation, or the like.

Based on the omni-directional wheel 100 in the above embodiment, the present application also provides a lawn mower, which includes a mower body and the omni-directional wheel 100, wherein the omni-directional wheel 100 is connected to the mower body. By arranging the omni wheel 100 on the body, the risk of skidding between the roller 12 and the ground can be reduced, and the grip of the omni wheel 100 can be improved.

In summary, the embodiment of the utility model has the following beneficial effects: the fixing member 14 in the embodiment of the present application not only abuts against the inner ring 132 of the bearing 13, and prevents the inner ring 132 from shaking, but also abuts against the outer ring 134 of the bearing 13 at the same time, and further prevents the outer ring 134 from shaking, so that the fixing member 14 abuts against the inner ring 132 and the outer ring 134 of the bearing 13 at the same time, and the bearing 13 can be fastened in the wheel cavity 122, thereby improving the reliability and the connection strength of the rotational connection between the connecting member 11 and the roller 12. And because the contact area between the roller 12 and the bearing 13 is small, the friction acting force of the bearing 13 on the roller 12 can be reduced, and the rotation flexibility of the roller 12 is improved.

The above are only embodiments of the present invention, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept of the present invention, but these are all within the scope of the present invention.

Claims

1. A rotatable wheel, comprising:

the connecting piece is provided with a pin shaft in a protruding mode;

the roller is sleeved on the pin shaft, and a convex part is arranged on the inner side wall of the roller;

the inner ring of the bearing is sleeved on the pin shaft, and the outer ring of the bearing abuts against one side, away from the connecting piece, of the protruding part; and

and the fixing piece is abutted against one side of the inner ring and the outer ring of the bearing, which are deviated from the bulge part.

2. The wheel as claimed in claim 1, wherein the fixing member includes a first fixing member and a second fixing member, the first fixing member is connected to the pin and abuts against a side of the inner race of the bearing facing away from the protrusion, and the second fixing member is connected to the roller and abuts against a side of the outer race of the bearing facing away from the protrusion.

3. The rotor of claim 2, wherein the first and second fixtures are arranged in a circular ring shape, the fixtures further include a first pin and a plurality of second pins, the first pin and the pin are coaxially arranged and connected to the pin, a nut of the first pin abuts against one side of the first fixture departing from the inner ring of the bearing, the second pins are arranged along the circumferential direction of the second fixture, and the second pins are connected to the roller and abut against one side of the second fixture departing from the outer ring of the bearing.

4. The rotor as in claim 1, wherein the connecting member has a reinforcement disposed thereon, the reinforcement and the pin being disposed on opposite surfaces of the connecting member.

5. The wheel as claimed in claim 1, wherein a plurality of anti-slip ribs are provided on an outer side wall of the wheel, and the plurality of anti-slip ribs are provided in parallel at intervals in an axial direction of the wheel.

6. The rotating wheel according to any one of claims 1 to 5, wherein the roller is a tapered wheel, and the diameter of the roller on the side close to the connecting piece is larger than the diameter of the roller on the side away from the connecting piece.

7. An omni wheel comprising a wheel disc and a plurality of rotatable wheels according to any one of claims 1 to 6, wherein the plurality of rotatable wheels are attached to the wheel disc and are circumferentially spaced around the wheel disc.

8. The omni wheel according to claim 7, wherein a plurality of spaced apart clamping grooves are formed in the wheel disc, and a limiting block is disposed at an end of the connecting member of the rotating wheel away from the pin shaft and is limited in the clamping grooves.

9. An omni wheel according to claim 7, wherein the omni wheel comprises a motor coupled to the disc for driving the disc in rotation.

10. A lawnmower comprising a body and an omni wheel according to any one of claims 7 to 9, the omni wheel being attached to the body.