Connecting structure for universal wheel

Abstract

A clamping portion is arranged on the universal wheel, the connecting structure comprises an elastic shaft casing, a necking section is arranged at one end of the elastic shaft casing, the necking section is rotatably connected with the clamping portion, a plurality of straight-line insertion teeth are axially arranged at the other end of the elastic shaft casing, and the universal wheel is connected with an installation hole of external equipment in an inserted mode through the straight-line insertion teeth. The necking section of the elastic shaft shell is rotationally connected with the clamping part of the universal wheel, the straight grain insertion teeth of the elastic shaft shell are connected with the mounting hole of external equipment in an inserted mode, the structure is simple, the universal wheel can be rapidly disassembled and assembled, and the elastic shaft shell is beneficial to machining, manufacturing and cost control.

Description

Technical Field

[0001] The utility model relates to the technical field of connection structures, in particular to a connection structure for a universal wheel. Background Art

[0002] With the development of science and technology and the improvement of living standards, more and more equipment needs to be moved, and casters have become an indispensable part. Among them, the swivel caster is a common structure, which can rotate 360 degrees horizontally, greatly improving the flexibility of equipment movement.

[0003] At present, for the universal wheels on the market, their connection structures usually rotate and set connection iron rods on the universal wheel body, and a number of connection teeth are formed on the connection iron rods through a thread rolling process, and the connection teeth are used to fixedly connect with the equipment that needs to install the universal wheel. However, this structure has deficiencies. Since thread rolling is directly carried out on the connection iron rod, the process precision requirements are relatively high, which easily leads to poor thread rolling effects, and the manufacturing process is more troublesome and the processing cost is relatively high. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a connection structure for a universal wheel, which is convenient to install, can simplify the processing procedure and reduce the manufacturing cost.

[0005] To achieve the above purpose, the solution of the utility model is: a connection structure for a universal wheel, a clamping part is arranged on the universal wheel, including an elastic shaft shell, a necking section is arranged at one end of the elastic shaft shell, the necking section is rotationally connected with the clamping part, a number of straight-threaded teeth are axially arranged at the other end of the elastic shaft shell, and the straight-threaded teeth are used for inserting and connecting the universal wheel with the mounting hole of an external device.

[0006] Preferably, it further includes a reinforcing rod, a blind hole matching with the reinforcing rod is axially opened on the elastic shaft shell, and the reinforcing rod is inserted into the blind hole.

[0007] Preferably, the shape of the reinforcing rod is cylindrical.

[0008] Preferably, it further includes a flange, the flange is arranged in the middle of the elastic shaft shell, the necking section is arranged at the end of the elastic shaft shell far from the flange, and the straight-threaded teeth extend from the flange to the other end of the elastic shaft shell.

[0009] Preferably, the straight-threaded teeth are evenly distributed around the axis of the elastic shaft shell.

[0010] Preferably, the elastic shaft shell is made of polyester fiber material.

[0011] Preferably, the elastic shaft shell is integrally formed by processing.

[0012] After adopting the above solution, the beneficial effects of the present utility model are as follows: The present utility model is rotationally connected through the necking section of the elastic shaft housing and the clamping portion of the universal wheel, and is inserted and connected through the straight-tooth broach of the elastic shaft housing and the mounting hole of the external device. The structure is simple, the universal wheel can be quickly disassembled and assembled, and the elastic shaft housing is conducive to processing and manufacturing and cost control. Description of the Drawings

[0013] Figure 1 is a schematic structural view of the present utility model;

[0014] Figure 2 is an exploded structural view of the present utility model;

[0015] Figure 3 is a top view of the present utility model;

[0016] Figure 4 is a schematic view of the present utility model installed on the universal wheel;

[0017] Figure 5 is a cross-sectional view of the present utility model installed on the universal wheel;

[0018] Figure 6 is a schematic view of the present utility model removed from the universal wheel.

[0019] Reference Numeral Description:

[0020] 1. Elastic shaft housing; 10. Necking section; 11. Straight-tooth broach; 12. Blind hole; 2. Reinforcing rod; 3. Flange; 4. Universal wheel; 40. Clamping portion; 41. Anti-detachment position. Detailed Embodiment

[0021] The present utility model will be further described below in conjunction with the drawings and specific embodiments.

[0022] This embodiment provides a connection structure for the universal wheel 4. The universal wheel 4 is provided with a clamping portion 40. As Figures 1 to 6 shown, it includes an elastic shaft housing 1. One end of the elastic shaft housing 1 is provided with a necking section 10, and the necking section 10 is rotationally connected to the clamping portion 40. The other end of the elastic shaft housing 1 is axially provided with a plurality of straight-tooth broaches 11, and the straight-tooth broaches 11 are used for the universal wheel 4 to be inserted and connected with the mounting hole of the external device.

[0023] In this embodiment, the necking section 10 at one end of the elastic shaft housing 1 is rotationally connected to the clamping portion 40 of the universal wheel 4, which not only ensures the stability of the connection, but also allows the universal wheel 4 to rotate freely in multiple directions, improving the overall flexibility of the device. Specifically, the clamping portion 40 of the universal wheel 4 only needs to be provided with a mounting blind hole, and an anti-detachment position 41 matching the necking section 10 is provided in the mounting blind hole. As Figure 4 and 5As shown, when installing, align one end of the elastic shaft housing 1 with the installation blind hole and press it in forcefully, so that the necking section 10 is engaged and matched with the anti - detachment clamping position 41. When disassembling, just pull out the elastic shaft housing 1 forcefully. As Figure 6 shown, the structure is simple and the installation and disassembly are convenient. On the other end of the elastic shaft housing 1, there are a number of straight - grooved splines 11 axially arranged, which simplifies the installation process, enabling users to quickly complete the installation of the universal wheel 4 without complex tools or operations. Specifically, for the external device that needs to install the universal wheel 4, only an installation hole needs to be set. This installation hole can be a blind hole or other shapes such as a threaded hole. When installing, embed the straight - grooved splines 11 at the other end of the elastic shaft housing 1 into the installation hole of the external device. Due to the certain deformation ability of the elastic shaft housing 1, the straight - grooved splines 11 can push against the hole wall of the installation hole in the installation hole, exerting pressure on the hole wall to prevent the universal wheel 4 from easily falling out of the installation hole, with a clever design. The size of the elastic shaft housing 1 in this embodiment is not limited, and the lengths and diameters of the end with the straight - grooved splines 11 and the end with the necking section 10 can be adjusted according to actual needs.

[0024] As Figure 2 shown, it also includes a reinforcing rod 2. A blind hole 12 matching the reinforcing rod 2 is axially opened on the elastic shaft housing 1, and the reinforcing rod 2 is inserted through the blind hole 12. The reinforcing rod 2 in this embodiment can significantly enhance the rigidity and load - bearing capacity of the elastic shaft housing 1, making the universal wheel 4 more stable when bearing a large weight or being impacted, reducing the risk of damage caused by overload. In addition, the reinforcing rod 2 can effectively limit the excessive deformation of the elastic shaft housing 1 and maintain the stability of the connection of the universal wheel 4.

[0025] As Figure 2 shown, in this embodiment, the shape of the reinforcing rod 2 is cylindrical, but it is not limited to this. Setting the reinforcing rod 2 as a cylinder has the maximum supporting force, making the elastic shaft housing 1 more stable when bearing pressure. When the amount of processing materials is the same, the cylinder can make the best use of the material properties and is conducive to processing and manufacturing. In other embodiments, the reinforcing rod 2 can also be set in other shapes such as a square column.

[0026] As Figure 1 and Figure 2 shown, it also includes a flange 3. The flange 3 is arranged in the middle of the elastic shaft housing 1, but it is not limited to this. The elastic shaft housing 1 is provided with the necking section 10 at one end far from the flange 3, and the straight - grooved splines 11 extend from the flange 3 to the other end of the elastic shaft housing 1. In this embodiment, the flange 3 is arranged in the middle of the elastic shaft housing 1, playing a limiting role. When the elastic shaft housing 1 is inserted and connected to the installation hole of the external device through the straight - grooved splines 11, the flange 3 can limit the direct contact between the external device and the universal wheel 4, extending the service life.

[0027] As Figure 3As shown, the straight-toothed splines 11 of this embodiment are evenly distributed around the axis of the elastic shaft housing 1, enabling the universal wheel 4 to be evenly stressed during the connection process, avoiding local stress concentration, and improving the stability and safety of the connection. By increasing the number of straight-toothed splines 11, the contact area between the straight-toothed splines 11 and the mounting holes of external devices can be increased, making the connection more secure.

[0028] Furthermore, the elastic shaft housing 1 of this embodiment is made of polyester fiber material, which has a high tensile strength, enabling the elastic shaft housing 1 to withstand large external forces and impacts. Moreover, the polyester fiber material is easy to process and form, helping to reduce production costs. In other embodiments, other elastic materials can also be used.

[0029] Furthermore, the elastic shaft housing 1 of this embodiment is manufactured by integral molding, which helps to improve the structural strength of the elastic shaft housing 1. Integral molding can also ensure the accuracy and consistency of the straight-toothed splines 11. In addition, due to the compact and seamless structure of the integrally molded elastic shaft housing 1, the service life can be effectively extended, and the aesthetic appearance of the product is improved.

[0030] The usage process of the present utility model is as follows:

[0031] The user selects an elastic shaft housing 1 of a suitable size, inserts the reinforcing rod 2 into the blind hole 12 of the elastic shaft housing 1, and then presses one end of the elastic shaft housing 1 with a necking section 10 against the clamping portion 40 on the universal wheel 4 forcefully. Since the clamping portion 40 of the universal wheel 4 is provided with an anti-disengagement position 41 matching the necking section 10, one end of the elastic shaft housing 1 can be rotatably connected to the universal wheel 4 through the necking section 10.

[0032] Then, the straight-toothed splines 11 at the other end of the elastic shaft housing 1 are aligned with the mounting holes on the external device to which the universal wheel 4 needs to be connected and pressed in forcefully. When the straight-toothed splines 11 are inserted into the mounting holes, they can exert pressure on the hole walls of the mounting holes, enabling the universal wheel 4 to be stably mounted on the external device through the other end of the elastic shaft housing 1.

[0033] The orientation terms mentioned in this specification are defined relative to the structures shown in the respective drawings. They are relative concepts and may therefore change accordingly depending on their different positions and usage states. Therefore, these or other orientation terms should not be construed as restrictive terms.

[0034] The above are only the preferred embodiments of the present utility model and do not limit the design of this case. All equivalent changes made according to the key design of this case fall within the protection scope of this case.

Claims

1. A connection structure for a universal wheel, wherein the universal wheel is provided with a clamping portion, characterized in that: It comprises an elastic shaft shell, one end of which is provided with a necking section, which is rotatably connected with a clamping part, and the other end of which is axially provided with a plurality of straight-groove splines for inserting and connecting the universal wheel with the mounting hole of an external device.

2. A connection structure for a universal wheel as claimed in claim 1, characterized in that: It also includes a reinforcing rod. A blind hole matching the reinforcing rod is axially opened on the elastic shaft shell, and the reinforcing rod is inserted into the blind hole.

3. A connection structure for a universal wheel as claimed in claim 2, characterized in that: The reinforcing rod is cylindrical in shape.

4. A connection structure for a universal wheel according to claim 1, characterized in that: It also includes a flange, which is arranged in the middle of the elastic shaft shell. The elastic shaft shell is provided with the necking section at one end away from the flange, and the straight-grained splines extend from the flange to the other end of the elastic shaft shell.

5. A connection structure for a universal wheel according to claim 1, characterized in that: The straight-grained slotted teeth are evenly distributed and arranged around the axis of the elastic shaft housing.

6. A connection structure for a universal wheel as claimed in claim 1, characterized in that: The elastic shaft shell is made of polyester fiber material.

7. A connection structure for a universal wheel according to claim 1, characterized in that: The elastic shaft housing is manufactured by integral molding.

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