WO2024087569A1

WO2024087569A1 - Omnidirectional wheel

Info

Publication number: WO2024087569A1
Application number: PCT/CN2023/092210
Authority: WO
Inventors: 方志强; 吴世宏
Original assignee: 厦门兴联智控科技有限公司
Priority date: 2022-10-27
Filing date: 2023-05-05
Publication date: 2024-05-02
Also published as: CN218948830U

Abstract

An omnidirectional wheel, comprising a wheel base (100) and roller sets, wherein a plurality of roller sets are distributed in a circumferential direction of the wheel base (100), and the roller sets are assembled on the wheel base (100) by means of connecting rods (200); the wheel base (100) is composed of two fixing frames fastened to each other, and is provided with mounting cavities; the connecting rods (200) are mounted in the mounting cavities, and one end of each of the connecting rods is connected to the roller sets; and each mounting cavity is composed of two penetrating mounting grooves (101), and the two mounting grooves (101) are respectively provided on the two fastened fixing frames. The wheel base (100) is provided with a plurality of mounting cavities for the connecting rods (200) to be embedded therein, each mounting cavity is composed of two mounting grooves (101) fastened to each other, and each mounting groove (101) is a groove formed in a fixing base, so that the connecting rods (200) are stably embedded and mounted, and embedding mounting saves on time and is accurate in terms of installation during an actual assembly process while improving the structural stability, thereby improving the structural stability and safety of the omnidirectional wheel, reducing the processing time cost, and solving the technical problem in the prior art.

Description

An omnidirectional wheel

Technical Field

The utility model relates to the technical field of omnidirectional wheels, in particular to an omnidirectional wheel which is easy to install and stable.

Background technique

Existing disclosed technical solutions: A large roller and a small roller in a compact omnidirectional wheel are respectively installed on a wheel seat through a first bracket and a second bracket, and the outer edge of the small roller is located in the receiving groove of the adjacent large roller, so that the large roller and the small roller are enveloping to form a complete circular wheel, wherein the upper connecting plate and the lower connecting plate are flat plates and connected to the protrusion of the bracket through the bayonet openings provided thereon, so as to realize the installation of the large roller and the small roller. In the above-mentioned solution, in the actual assembly process of the connecting plate and the bracket, each buckle needs to be plugged and matched with the corresponding protrusion, and then locked with screws, which leads to a long assembly time and poor stability, affecting the processing cost and efficiency of the omnidirectional wheel.

Therefore, how to solve the problems of cumbersome alignment, complicated assembly and increased time cost in the above-mentioned prior art is one of the technical problems that technicians in this field need to solve.

Utility Model Content

In order to solve the technical problems existing in the above-mentioned prior art, the purpose of the utility model is to provide an omnidirectional wheel which is easy to install and stable.

In order to achieve the above purpose, the utility model adopts the following technical solutions:

An omnidirectional wheel comprises a wheel seat and a roller group, wherein a plurality of roller groups are distributed along the circumference of the wheel seat, and the roller groups are assembled on the wheel seat through a connecting rod, wherein:

The wheel seat is composed of two mutually interlocking fixing frames, which are provided with a mounting cavity;

The connecting rod is installed in the installation cavity, and one end of the connecting rod is connected to the roller assembly;

The installation cavity is composed of two through installation grooves, and the two installation grooves are respectively arranged on two buckled fixing frames.

Further preferably, a plug-in protrusion is provided on the bottom surface of the mounting groove, and the plug-in protrusion is inserted into the recess of the connecting rod.

Further preferably, one end of the connecting rod extends out of the installation cavity and is connected to the roller assembly; the other end of the connecting rod is placed in the installation cavity, and the notches are provided on both side edges thereof.

Further preferably, the two fixing frames are an upper fixing frame and a lower fixing frame respectively, and are locked by screws, wherein:

The upper fixing frame is provided with a connecting through hole, and the lower fixing frame is provided with a screw hole;

The connecting through hole is coaxially distributed with the screw;

The screw passes through the connecting through hole and is screwed into the screw hole.

Further preferably: the plurality of connecting through holes are distributed in a ring array, and each connecting through hole is located between adjacent mounting grooves;

The plurality of screw holes are distributed in a circular array, and each screw hole is located between adjacent mounting slots.

Further preferably, the annular side wall of the screw hole extends toward the connecting through hole and extends into the lower fixing frame.

Further preferably, the wheel seat is provided with a plurality of inner recesses along its circumference.

Further preferably, the plurality of roller groups are divided into large roller groups and small roller groups, and are alternately distributed around the wheel seat;

Each inner recess is provided with a large roller set.

Further preferably, one end of the small roller in the small roller group extends into the large roller in the adjacent large roller group.

Further preferably: the center of the wheel seat has a through hole, and both ends of the through hole are respectively embedded with wheel hub bearings;

A decorative cover is provided at one end of the through hole;

The buckle of the decorative cover is engaged with the engaging groove of the fixing frame.

After adopting the above technical solution, the utility model has the following advantages compared with the background technology:

1. The utility model has a mounting cavity in the wheel seat for embedding the connecting rod. The mounting cavity is composed of two mutually interlocking mounting grooves. Each mounting groove is a groove formed on the fixing seat, so as to realize stable embedding installation of the connecting rod. While improving the structural stability, the embedded installation saves time and is accurate in the actual assembly process, thereby improving the structural stability and safety of the omnidirectional wheel, reducing the time cost of processing, and solving the technical problems existing in the prior art.

2. The bottom surface of the installation groove in the utility model is provided with a plug-in protrusion, and each plug-in protrusion is plugged into a notch on the connecting rod to position the connecting rod, thereby achieving rapid assembly and improving assembly accuracy;

3. The two fixing seats described in the utility model are also locked by screws passing through, which further improves the structural stability of the connecting rod and the structural stability of the omnidirectional wheel;

4. The decorative cover in the utility model utilizes a buckle to engage with a corresponding slot of the lower fixing frame to achieve stable installation of the decorative cover.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic perspective view of the structure of the omnidirectional wheel in an embodiment of the present utility model;

FIG2 is a schematic diagram of the structure of the omnidirectional wheel in an embodiment of the present utility model;

3 is a radial structural cross-sectional view of the omnidirectional wheel in an embodiment of the utility model;

FIG4 is an axial structural cross-sectional view of the omnidirectional wheel in an embodiment of the utility model;

5 is a schematic diagram of the assembly structure of the large roller group and the small roller group and the lower fixing frame in the embodiment of the utility model;

FIG6 is a schematic diagram of the structure of the large roller group described in the embodiment of the utility model;

7 is a schematic diagram of the structure of the small roller group described in the embodiment of the utility model;

8 is a schematic structural diagram of the upper fixing frame in the embodiment of the utility model;

9 is a cross-sectional view of the upper fixing frame structure in an embodiment of the present utility model;

10 is a schematic structural diagram of the lower fixing frame in the embodiment of the utility model;

FIG. 11 is a cross-sectional view of the lower fixing frame structure in an embodiment of the present utility model.

The description of the accompanying drawings is as follows:

10. Screws;

100, wheel seat; 101, mounting groove; 102, plug-in protrusion; 110, upper fixing frame; 111 connecting through hole; 120, lower fixing frame; 121, screw hole; 122, snap-in groove; 130, embedded groove;

200, connecting rod; 201, notch; 210, through hole;

300, large roller set; 310, large roller; 320, large bearing; 330, large roller; 340, large nut;

400, small roller assembly; 410, small roller; 420, small bearing; 430, small roller; 440, small nut;

500, wheel hub bearing;

600. Decorative cover.

Detailed ways

The existing universal wheels have technical problems such as inaccurate wheel seat alignment during assembly, long assembly time, and inability to achieve fast and stable assembly.

In view of the above technical problems, the inventors have analyzed the causes and continuously researched and discovered an omnidirectional wheel. In the scheme, a mounting cavity is provided in the wheel seat for embedding the connecting rod, and the mounting cavity is composed of two mounting grooves that interlock with each other. Each mounting groove is a groove provided on the fixed seat, so as to realize stable embedded installation of the connecting rod. While improving the structural stability, the embedded installation saves time in the actual assembly process and the installation is accurate, thereby improving the structural stability and safety of the omnidirectional wheel, reducing the time cost of processing, and solving the technical problems existing in the prior art.

In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

It should be noted that in the present invention, the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

Example

As shown in Fig. 1 to Fig. 3, an omnidirectional wheel comprises a wheel seat 100 and a roller group, wherein a plurality of the roller groups are mounted on the wheel seat 100 and arranged along the circumference of the wheel axle. The roller group is embedded in the mounting groove 101 of the wheel seat 100 through a connecting rod 200 and is locked by screws.

As shown in FIG. 1 and FIG. 3 , each roller assembly is assembled on the wheel seat 100 via a connecting rod 200 . A through hole 210 is formed at one end of the connecting rod 200 away from the wheel seat 100 for assembling the roller assembly.

As shown in Figures 1 to 11, each roller assembly includes a roller, a bearing and a roller shaft. The roller shaft is a stainless steel plug screw, which is assembled in the through hole 210 of the connecting rod 200 and is perpendicular to the connecting rod 200. There are two rollers in each roller assembly. The two rollers are mounted at both ends of the roller shaft and are symmetrically distributed. The number of the bearings matches the rollers. That is to say, in this embodiment, the number of rollers is two, that is, the number of the bearings is also two, and each bearing is assembled between the roller shaft and the roller. It should be noted that a nut is assembled on the plug screw.

As shown in Figures 1 to 11, the multiple roller groups include a large roller group 300 and a small roller group 400. The number of the large roller groups 300 and the small roller groups 400 are the same and are distributed alternately, that is, two large roller groups 300 are set on both sides of a small roller group 400, and two small roller groups 400 are set on both sides of a large roller group 300.

In combination with Figures 1 to 11, in detail: the large roller group 300 includes a large roller 310, a large bearing 320 and a large roller 330, the large roller 330 is vertically inserted into the through hole 210 of the connecting rod 200, two large rollers 310 are installed at both ends of the large roller 330, and the large bearing 320 is also arranged between each large roller 310 and the large roller 330; a through hole is provided in the center of the large roller 310, and the through hole is composed of a large diameter section and a small diameter section that are mutually connected, the large diameter section and the small diameter section are coaxially distributed, and the small diameter section is arranged close to the connecting rod 200; the small diameter section is plug-in assembled with the large roller 330, and the large roller 330 passes through the small diameter section and extends into the large diameter section; the two large bearings 320 are installed at both ends of the large roller 330, each large bearing 320 is located on the large diameter section of the large roller 310, and the large roller 330 is also equipped with a large nut 340. The small roller assembly 400 includes a small roller 410, a small bearing 420 and a small roller 430. The small roller 430 is vertically inserted into the through hole 210 of the connecting rod 200. Two small rollers 410 are inserted at both ends of the small roller 430. The small bearing 420 is also arranged between each small roller 410 and the small roller 430. A through hole is opened in the center of the small roller 410. The through hole is composed of a large diameter section and a small diameter section that are mutually connected. The large diameter section is coaxially distributed with the small diameter end, and the small diameter section is arranged close to the connecting rod 200. The small diameter section is plugged and assembled with the small roller 430. The small roller 430 passes through the small diameter section and extends into the large diameter section. The two small bearings 420 are assembled at both ends of the small roller 430. Each large bearing 320 is located on the large diameter section of the large roller 310. The small roller 430 is also equipped with a small nut 440.

It should be noted here that: as shown in Figure 3, the small rollers 410 are arranged on both sides of a large roller 310, and the edges of the small rollers 410 extend into the axial hole of the large roller 610, that is to say: the end of each small roller away from the connecting rod extends into the large roller, so that the large roller and the adjacent small rollers have an overlapping arrangement, which effectively reduces the volume of the universal wheel while ensuring that universal rolling can be achieved, thereby obtaining a compact universal wheel.

The large roller 310 and the small roller 410 are both rubber wheels, and the large roller 330 and the small roller 430 are both plug screws.

As shown in FIG. 1 to FIG. 11 , the connecting rod 200 is a flat plate of a stainless steel body and is embedded in the wheel seat 100. A through hole 210 is provided at one end of the connecting rod 200, and the through hole 210 is used to install the roller. Specifically, notches 201 are provided at both sides of the edge close to the other end of the connecting rod 200, that is, the end of the connecting rod 200 away from the roller assembly is the other end, and notches 201 recessed toward the inside of the connecting rod 200 are provided at both sides of the edge, that is, the number of the single-side edge notches 201 can be multiple, and the multiple notches 201 are distributed at intervals. In this embodiment, the number of the single-side edge notches 201 at the other end of the connecting rod is three, and the three notches 201 are distributed at intervals.

As shown in FIG. 1 to FIG. 11 , the wheel seat 100 is composed of two mutually buckled fixing frames. The buckling surface of each fixing frame is provided with a mounting groove 101, and the mounting groove 101 is a strip groove and is distributed along the radial direction of the wheel seat 100. The bottom surface of the mounting groove 101 is provided with plug-in protrusions 102, and the number of the plug-in protrusions 102 is adapted to the notches 201 of the connecting rod 200. In other words, when the two fixing frames are buckled with each other, the mounting grooves 101 on each fixing frame are connected to each other and connected to form a mounting cavity, and the connecting rod 200 is installed in the mounting cavity, and the notches 201 on the two side edges of the connecting rod 200 are matched with the plug-in protrusions 102 on the bottom surfaces of the two mounting grooves 101 to position the connecting rod 200, thereby realizing stable and rapid installation of the connecting rod 200.

As shown in FIG. 1 to FIG. 11 , the two fixing frames include an upper fixing frame 110 and a lower fixing frame 120, and the upper and lower fixing frames 120 are both plastic parts, that is, parts made of plastic. The upper fixing frame 110 is provided with a plurality of connecting through holes 111, and each connecting through hole 111 is located between two adjacent connecting rods 200, that is, between two adjacent mounting grooves 101; the lower fixing frame 120 is provided with a plurality of screw holes 121, and each screw hole 121 is located between two adjacent connecting rods 200, that is, between two adjacent mounting grooves 101; each screw hole 121 is arranged opposite to one of the connecting through holes 111, and the screw hole 121 is connected and penetrated with the connecting through hole 111 to form a screw assembly hole. It should be noted that the two fixing frames are locked together by screws 10, that is, the number and position of the connecting through holes 111 are compatible with the screw holes 121, the number and installation positions of the screws 10 are compatible with the screw holes 121, and each screw 10 passes through the connecting through hole 111 on the upper fixing frame 110, extends into the screw hole 121 and is screwed with the screw hole 121, thereby achieving the purpose of locking the upper and lower fixing frames 110 and 120. It should be noted that: in order to improve the stability of the structure and the smoothness of installation, the screw hole 121 extends out of the buckling surface of the lower fixing frame 120 and extends into the upper fixing frame 110, so as to dock with and penetrate the connecting through hole 111, that is to say: the side wall of the screw hole 121 extends toward the upper fixing frame 110 and protrudes from the lower fixing frame 120. When the upper and lower fixing frames 110, 120 are buckled, the part protruding from the lower fixing frame 120 extends into the upper fixing frame 110, and docks with and penetrates the corresponding connecting through hole 111.

It should be noted that: the connecting through hole 111 on the upper fixing frame 110 is coaxially distributed with the screw hole 121 of the lower fixing frame 120 at the corresponding position; the screw 10 locking the upper and lower fixing frames 110 and 120 is a carbon steel screw.

As shown in Figures 1 to 11, the shape of the wheel seat 100 can be set according to actual needs. In the present embodiment, the wheel seat 100 is pentagonal. It should be noted that each side of the wheel seat 100 has an inner recess, that is, the side surface at each side of the wheel seat is an arc-shaped surface, and the arc-shaped surface is arched toward the central square of the wheel seat 100. In the present embodiment, the wheel seat has five inner recesses for assembling roller groups, thereby realizing compact installation of adjacent roller groups and achieving the purpose of reducing the volume, thereby obtaining a compact universal wheel.

As shown in Figures 8 to 11, in this embodiment: the buckling surface of each fixing frame is provided with 10 installation grooves 101, and after the two fixing frames are buckled, 10 installation cavities are obtained to assemble 10 connecting rods 200, and 10 roller groups are installed on the 10 connecting rods 200, and the 10 roller groups include 5 large roller groups 300 and 5 small roller groups 400.

It should be noted that the buckling surface of each fixing frame is the contact surface when one fixing frame is buckled and docked with another fixing frame.

As shown in Fig. 3, Fig. 8 to Fig. 11, a through hole is provided at the center of the wheel seat for assembling a rotating shaft (not shown); both ends of the through hole are provided with embedding grooves 130, which are annular grooves coaxially distributed with the through hole for embedding a wheel hub bearing 500, and the inner diameter of the embedding groove 130 is larger than the inner diameter of the through hole, and a plastic decorative cover 600 is buckled on the opening surface of the embedding groove 130. Specifically, the decorative cover 600 is provided with a buckle and a push rod on one side of the lower fixing frame 120, the buckle is in a J shape and extends into the clamping groove 122 provided on the lower fixing frame 120, and a plurality of buckles are in an annular array; the push rod is pressed against the outer surface of the lower fixing frame 120, and is stably assembled on one side of the lower fixing frame 120.

With reference to FIGS. 1 to 11 , the assembly process of the omnidirectional wheel is as follows:

Assemble the roller group on the connecting rod 200, and multiple roller groups are arranged in a ring array;

The upper and lower fixing frames 120 are buckled from the upper and lower sides of the connecting rod 200 respectively. During the buckling process of the upper and lower fixing frames 120, the two sides of the connecting rod 200 are respectively inserted into the installation grooves 101 of the upper and lower fixing frames 110 and 120. When the two installation grooves 101 distributed up and down are connected and connected, the connecting rod 200 is embedded in the installation cavity formed by the two installation grooves 101; it should be noted that the notches 201 on both sides of the connecting rod 200 are aligned and plugged with the corresponding plug-in protrusions 102 at the bottom of the installation grooves 101, so as to realize the assembly of the wheel seat 100 and the roller assembly;

The screws 10 are inserted from the connecting through holes 111 of the upper fixing frame 110 into the screw holes 121 of the lower fixing frame 120 and are screwed into the screw holes 121 to achieve locking of the upper and lower fixing frames 110 and 120 .

The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

An omnidirectional wheel, characterized in that it comprises a wheel seat and a roller group, wherein a plurality of roller groups are distributed along the circumference of the wheel seat, and the roller group is assembled on the wheel seat through a connecting rod, wherein:

The wheel seat is composed of two mutually interlocking fixing frames, which are provided with a mounting cavity;

The connecting rod is installed in the installation cavity, and one end of the connecting rod is connected to the roller assembly;

The installation cavity is composed of two through installation grooves, and the two installation grooves are respectively arranged on two buckled fixing frames.
The omnidirectional wheel according to claim 1 is characterized in that: a plug-in protrusion is provided on the bottom surface of the mounting groove, and the plug-in protrusion is inserted into the recess of the connecting rod.
The omnidirectional wheel according to claim 2 is characterized in that: one end of the connecting rod extends out of the mounting cavity and is connected to the roller assembly; the other end of the connecting rod is placed in the mounting cavity, and the notches are provided on both side edges thereof.
The omnidirectional wheel according to claim 3 is characterized in that: the two fixing frames are respectively an upper fixing frame and a lower fixing frame, and are locked by screws, wherein:

The upper fixing frame is provided with a connecting through hole, and the lower fixing frame is provided with a screw hole;

The connecting through hole is coaxially distributed with the screw;

The screw passes through the connecting through hole and is screwed into the screw hole.
The omnidirectional wheel according to claim 4, characterized in that: the plurality of connecting through holes are distributed in a circular array, and each of the connecting through holes is located between adjacent mounting grooves;

The plurality of screw holes are distributed in a circular array, and each screw hole is located between adjacent mounting slots.
The omnidirectional wheel according to claim 4, characterized in that the annular side wall of the screw hole extends toward the connecting through hole and extends into the lower fixing frame.
The omnidirectional wheel according to claim 1 is characterized in that the wheel seat is provided with a plurality of inner recesses along its circumference.
The omnidirectional wheel according to claim 7, characterized in that: the plurality of roller groups are divided into large roller groups and small roller groups, and are alternately distributed around the wheel seat;

Each inner recess is provided with a large roller set.
The omnidirectional wheel according to claim 8, characterized in that one end of the small roller in the small roller group extends into the large roller in the adjacent large roller group.
The omnidirectional wheel according to claim 1 is characterized in that: the center of the wheel seat has a through hole, and the two ends of the through hole are respectively embedded with wheel hub bearings;

A decorative cover is provided at one end of the through hole;

The buckle of the decorative cover is engaged with the engaging groove of the fixing frame.