KR102495867B1 - Spoke structure of non-pneumatic tire - Google Patents

Abstract

One embodiment of the present invention is a spoke structure of a non-pneumatic tire serving as a structural support between a tread part in contact with the ground and a rim part connected to an axle, a first radial rib disposed adjacent to the rim part, and the The second radial rib disposed adjacent to the tread portion and formed along the radial direction of the non-pneumatic tire, and each corner of a plurality of hexagonal unit structures formed between the first radial rib and the second radial rib Provided is a spoke structure of a non-pneumatic tire, characterized in that it includes hinge parts formed on and a plurality of unit ribs forming the unit structures of the hexagonal structure.

Description

Spoke structure of non-pneumatic tire {SPOKE STRUCTURE OF NON-PNEUMATIC TIRE}

The present invention relates to a spoke structure of a non-pneumatic tire.

Tires can be classified into pneumatic tires, non-pneumatic tires, and solid tires according to whether or not air pressure is injected.

In general, pneumatic tires are used in most automobiles except for passenger cars and special purpose vehicles. Pneumatic tires have a complicated structure, and the air pressure inside the tire must be checked frequently. If the tire is damaged due to impact or penetration by an external substance while driving, it may cause a problem in driving stability.

A solid tire is a tire made entirely of rubber without filling the tire with air, and is used limitedly for heavy equipment or special vehicles because it is robust but has insufficient vibration absorption.

Unlike pneumatic tires, non-pneumatic tires do not use compressed air at all, so they are safe against accidents caused by loss of air pressure or flat tires. In addition, the manufacturing process of non-pneumatic tires is simpler than that of pneumatic tires, and has the advantage of preventing a standing wave phenomenon that may occur in pneumatic tires and improving rolling resistance.

As a non-pneumatic tire, 'non-pneumatic tire' of Patent Publication No. 2004-0027984 has been disclosed. Patent Publication No. 2004-0027984 includes a reinforced annular band and a plurality of web spokes that transmit a load force between a wheel or a hub in a tensioned state, and uses the elastic force of the annular band and the web spokes to remove from the road surface. It can absorb shock and support the load of the vehicle by using the web spoke structure.

However, Patent Publication No. 2004-0027984 has a structure in which a rubber tire is mounted on a metal wheel, and the wheel collides with an external object and the wheel is deformed and broken, resulting in bonding of a tire and a wheel made of dissimilar materials to each other. Problems with interfacial destruction and separation may occur on the surface.

The technical problem to be achieved by the present invention is to firmly secure the load bearing capacity as a non-pneumatic tire, improve the excellent durability, ride comfort and noise reduction as a non-pneumatic tire by improving the soft absorption performance for various impacts, and improve aerodynamics (aerodynamics). ) to provide a spoke structure having an advantage in terms of

The technical problem to be achieved by the present invention is not limited to the above-mentioned technical problem, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below. There will be.

In order to achieve the above technical problem, one embodiment of the present invention is a spoke structure of a non-pneumatic tire serving as a structural support between a tread part in contact with the ground and a rim part connected to an axle, disposed adjacent to the rim part a first radial rib, a second radial rib disposed adjacent to the tread portion and formed along the radial direction of the non-pneumatic tire, and a plurality of hexagons formed between the first radial rib and the second radial rib. Provided is a spoke structure of a non-pneumatic tire, characterized in that it includes hinge parts formed at each corner of the unit structures of the structure, and a plurality of unit ribs forming the unit structures of the hexagonal structure.

In an embodiment of the present invention, each of the unit structures of the hexagonal structure may be formed to protrude in a first direction and a second direction different from the first direction.

In an embodiment of the present invention, the protrusion direction of the intermediate hinge portion located on the middle line among the hinge portions constituting the unit structures of the hexagonal structure, and the protrusion of the edge hinge portion forming the corners of the upper and lower sides of the unit structure Directions may be formed differently from each other.

In an embodiment of the present invention, the hinge parts constituting the unit structures of the hexagonal structure include intermediate hinge parts located on the middle line and edge hinge parts forming the corners of the upper and lower sides of the unit structure And among the unit ribs constituting the unit structures of the hexagonal structure, the first group unit ribs disposed on one side of the intermediate hinge part and the second group unit ribs disposed on the other side may be inclined in different directions. .

In an embodiment of the present invention, protruding directions of respective intermediate hinge portions of unit structures adjacent to each other at upper and lower portions may be formed to be different from each other.

In an embodiment of the present invention, the outer surface of the spoke structure due to the shape of the plurality of first radial ribs and the inner surface of the spoke structure due to the shape of the plurality of second radial ribs may have a concave-convex structure there is.

In an embodiment of the present invention, the tread portion and the spoke structure may be integrally formed.

According to an embodiment of the present invention, load bearing capacity as a non-pneumatic tire is firmly secured, and excellent durability, riding comfort and noise reduction as a non-pneumatic tire can be improved by improving soft absorbing performance for various impacts.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be inferred from the description of the present invention or the configuration of the invention described in the claims.

1 is a view showing a non-pneumatic tire with easy tread replacement according to an embodiment of the present invention.
2 is a view showing a spoke structure according to an embodiment of the present invention.
3 is a view showing a spoke structure according to another embodiment of the present invention.
4 is an enlarged view of a portion of a spoke structure according to an embodiment of the present invention.
5 is a view showing a portion of a spoke structure according to another embodiment of the present invention.
6 is a diagram for explaining a non-pneumatic tire according to another embodiment of the present invention.
7 is a diagram for explaining a non-pneumatic tire according to another embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and, therefore, is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be "connected (connected, contacted, combined)" with another part, this is not only "directly connected", but also "indirectly connected" with another member in between. "Including cases where In addition, when a part "includes" a certain component, it means that it may further include other components without excluding other components unless otherwise stated.

Terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "include" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a non-pneumatic tire with easy tread replacement according to an embodiment of the present invention.

A non-pneumatic tire 10 as shown in FIG. 1 according to an embodiment of the present invention includes a main body 100, a wheel 200, an axle 300, a tread part 400, a spoke part 500, It may be configured to include the rim portion 600.

The non-pneumatic tire 10 of the present invention includes a tread portion 400 and a spoke portion 500 wrapped around a shock absorbing structure mounted on the main body 100, which are coupled in the form of a gearwheel, , It may be implemented in a form of sliding only to the side without departing in the driving direction while the vehicle is driving.

The tread part 400 according to the embodiment of the present invention is a part in contact with the ground, and the rim part 600 is a part connected to an axle (hereinafter referred to as a center cap) 300 . And, the spoke part 500 serves as a structural support between the tread part 400 and the center cap 300 .

In FIG. 1, which is an embodiment of the present invention, the tread part 400 and the spoke part 500 are divided into different configurations, but the tread part 400 and the spoke part 500 of the present invention are integrally formed may be implemented.

2 is a view showing a spoke part (hereinafter, spoke structure) according to an embodiment of the present invention.

FIG. 2(a) is a front view of the spoke structure 500 like the front view of the non-pneumatic tire 10 according to FIG. 1, and FIG. 2(b) is a three-dimensional view of the spoke structure 500.

The spoke structure 500 of the present invention may include ribs having a longitudinal cross section of a single closed curve circumscribing the rim portion 600 . The ribs of the spoke structure 500 may be formed in a circular arrangement with respect to the center cap 300 as a central axis.

The form in which ribs having a longitudinal cross section of a single closed curve are circularly arranged with respect to the center cap 300 of the non-pneumatic tire 10 constitutes a parametric structure and uniformly distributes the applied load. The parametric design has the advantage that the start and end of the spokes are structurally connected to each other to form an optimal curve while driving and to maximize comfort performance by adjusting the density within the ribs. In addition, the structure as described above can be expected to improve aerodynamics and noise reduction.

3 is a view showing a spoke structure according to another embodiment of the present invention.

FIG. 3(a) is a side view of the spoke structure 500, and FIG. 3(b) is an A-A cross-sectional view of FIG. 2(b).

4 is an enlarged view of a portion of a spoke structure according to an embodiment of the present invention, and FIG. 5 is a view showing a portion of a spoke structure according to another embodiment of the present invention.

In the spoke structure according to FIG. 4, the transverse direction is the same as the transverse direction in the spoke structure as shown in (b) of FIG. 2, which is an embodiment, and the longitudinal direction in the spoke structure according to FIG. 4 is as shown in (b) of FIG. It may be the same direction as the longitudinal direction in the spoke structure.

5(a) is a cross-sectional view of the spoke structure shown in FIG. 2, and FIG. 5(b) is a longitudinal cross-sectional view of the spoke structure shown in FIG.

Referring to FIG. 5 , a spoke structure 500 according to an embodiment of the present invention includes a first radial rib 530, a second radial rib 510, hinge parts 550, and unit ribs 570 can be configured. In addition, the spoke structure 500 of the present invention includes a plurality of unit structures formed by the first radial rib 510, the second radial rib 530, the hinge parts 550, and the unit ribs 570 ( 590) can be formed. In this case, the unit structures 590 according to an embodiment of the present invention may be implemented as hexagonal hexagonal structures.

The first radial rib 530 is disposed adjacent to the rim portion 600 and is formed along the radial direction of the non-pneumatic tire 10 .

In addition, the second radial rib 510 may be disposed adjacent to the tread portion 400 and formed along the radial direction of the non-pneumatic tire 10 .

The circumferential length of the second radial rib 510 is longer than that of the first radial rib 530 .

Also, the hinge parts 550 may be formed at each corner of a plurality of hexagonal unit structures formed between the first radial rib 530 and the second radial rib 510 .

Also, the unit ribs 570 and the hinge parts 550 by the unit ribs 570 may form hexagonal unit structures 590 .

In order to describe the spoke structure 500 of the present invention in more detail, it will be described later with reference to FIG. 4 .

As shown in FIG. 4, the spoke structure 500 of the parametric structure of the present invention has a plurality of unit structures 590 by a plurality of unit ribs 570 and a plurality of hinge parts 550 like a single closed curve. ) to form

At this time, looking at the structure of one unit structure 590 in detail, the hinge parts 550 constituting each unit structure 590 include an intermediate hinge part 551 located on the middle line of the unit structure 590, An upper edge hinge part 553 located on the upper side of the unit structure 590 based on the middle line to form a corner, and a lower edge hinge part located on the lower side of the unit structure 590 to form a corner ( 555) may be configured.

In addition, the unit ribs 570 constituting each unit structure 590 include the first group unit ribs disposed on one side of the intermediate hinge portion 551 and the second group unit ribs disposed on the other side of the intermediate hinge portion 551. It may be configured to include group unit ribs.

More specifically, according to the present embodiment, the unit ribs 570 constituting one unit structure 590 include the upper unit rib 571 positioned between the upper edge hinge parts 553 and the upper edge hinge part. First group unit ribs 573 located between 553 and middle hinge part 551, second group unit ribs 575 located between middle hinge part 551 and lower edge hinge part 555 ), and a lower unit rib 577 positioned between the lower edge hinge parts 555.

Referring to FIG. 4, which is an embodiment of the present invention, in each unit structure 590, the protruding direction of the middle hinge part 551 and the protruding direction of the upper edge hinge part 553 and the lower edge hinge part 555 are different from each other can be formed.

Also, the upper edge hinge part 553 and the lower edge hinge part 555 may protrude in the same direction.

According to the present embodiment, the first group unit ribs 573 and the second group unit ribs 575 constituting one unit structure 590 include an upper edge hinge portion 553 and a lower edge hinge portion 555 As shown in FIG. 4, may be formed inclined in different directions so as to protrude in a direction different from the protruding direction of the intermediate hinge portion 551.

According to one embodiment of the present invention, a structure formed by three unit ribs connected to the second radial rib 510 of the spoke structure 500 may be implemented in a trapezoidal shape rather than a hexagonal shape. Although not shown in FIG. 4, which is an embodiment, a structure formed by three unit ribs connected to the first radial rib 530 may also be implemented as a trapezoidal rectangle.

Referring to FIG. 4, it is formed above (based on the unit structure adjacent to the first radial rib) or below (based on the unit structure adjacent to the second radial rib) the above-described quadrangular unit structure, constituting the spoke structure 500 Protruding directions of the intermediate hinge parts 551 of the two different unit structures 590 organically connected to each other at the top or bottom may be formed to be different from each other.

In addition, as a unit structure located above or below the first group unit ribs disposed in the middle of the unit ribs constituting the spoke structure 500 of the present invention, two unit structures disposed in front and rear s 590 may be formed, and the upper edge hinge part of each of the two unit structures 590 arranged in front and back is provided as the same hinge part.

Referring back to FIGS. 2 and 3, the outer surface of the spoke structure 500 by the shape of the plurality of first radial ribs and the inner side of the spoke structure 500 by the shape of the plurality of second radial ribs of the present invention The surface may be prepared to have a concavo-convex structure.

6 is a diagram for explaining a non-pneumatic tire according to another embodiment of the present invention.

The non-pneumatic tire 10 of the present invention including the spoke structure (spoke part) 500 as described above with reference to FIGS. It may be implemented in a form, and the disassembly of the tread part 400 is possible. More specifically, the wheel 200 connected from the center cap 300 in normal times wraps around the side of the tread part 400 to prevent separation, and when the center cap 300 is pressed during replacement, all the wheels 200 move inward. It can be implemented as a non-pneumatic tire in the form of being able to separate the tread part 400 from the main body 100 by creating a space in which the tread part 400 can escape.

In the non-pneumatic tire 10 according to the embodiment of the present invention, the tread part 400 is separated from the main body 100 and the wheel 200 according to the above-described operating principle, so that the user can remove the tread part 400. Not only can it be easily replaced, but also has the advantage of being able to conveniently replace the spoke part 500 located inside the tread part 400 together.

The non-pneumatic tire 10 of the present invention is an environmentally friendly and sustainable tire because only the tread portion 400 can be replaced without replacing the entire tire. As the spoke structure serves as the air layer of the existing tire, the side wheel of the existing tire is not required, so the separated tread can be reprocessed, and recycling is effective, and the raw materials required for processing can also be significantly reduced.

Since the non-pneumatic tire 10 according to the present invention is not of a pneumatic type, a separate air pressure measurement sensor is not required. On the other hand, in the case of having a sensor for measuring temperature, acceleration, and tread depth, the sensor can be attached to the inside of the spoke to the part where the tread and the ground contact, which is located close to the ground and the road surface, thereby improving the accuracy of the measured data value. And since it is attached inside the spoke structure, maintenance and repair of the sensor is easy.

7 is a diagram for explaining a non-pneumatic tire according to another embodiment of the present invention.

As shown in FIG. 7, the non-pneumatic tire 10 according to the embodiment has a wheel module 730 including a tread separated left and right around a central module 710 located at the center of the tire, and the down force ( down force) can be implemented as an aerodynamic structure.

The wheel module including the tread may have a structure in which air is sucked into the central module 710 by mounting a turbine or a fan on the side.

In addition, the wheel modules disposed on both sides of the non-pneumatic tire 10 include wings made of rubber or polymer, and external air can be sucked into the central module 710 through the wings.

Here, the turbine or fan mounted on the wheel module 730 can increase the flow rate of air sucked through the wing and sucked in from the outside of the non-pneumatic tire to the inside.

As described above, the spoke structure described with reference to FIGS. 2 to 5 may be formed inside the wheel module 730 of the non-pneumatic tire 10 according to FIG. 7 .

As described above, the present invention improves maneuverability and riding comfort by applying and utilizing a structural reinforcing material structure advantageous to handling performance and vibration absorption during cornering of a non-pneumatic tire structurally supporting a load of a vehicle. The present invention, as a non-pneumatic tire, has sufficient structural rigidity to sufficiently support the load of a vehicle and maximizes the harmony of handling characteristics and riding comfort characteristics.

The above description of the present invention is for illustrative purposes, and those skilled in the art can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included in the scope of the present invention.

10: non-pneumatic tire
100: main body
200: wheel
300: center cap (axle)
400: tread part
500: spoke portion (spoke structure)
600: Limbu

Claims (7)

In the spoke structure of a non-pneumatic tire that serves as a structural support between the tread part in contact with the ground and the rim part connected to the axle,
A first radial rib disposed adjacent to the rim portion;
a second radial rib disposed adjacent to the tread portion and formed along a radial direction of the non-pneumatic tire;
Hinges formed at the corners of each of the plurality of hexagonal unit structures formed between the first radial rib and the second radial rib;
Includes a plurality of unit ribs forming unit structures of the hexagonal structure,
The spoke structure of a non-pneumatic tire, characterized in that each of the unit structures of the hexagonal structure is formed to protrude in a first direction and a second direction different from the first direction.
delete According to claim 1,
Among the hinge parts constituting the unit structures of the hexagonal structure, the protruding direction of the intermediate hinge part located on the middle line and the protruding direction of the edge hinge part forming the corners of the upper and lower sides of the unit structure are formed differently from each other A spoke structure of a non-pneumatic tire characterized by.
According to claim 1,
The hinge parts constituting the unit structures of the hexagonal structure include intermediate hinge parts positioned on an intermediate line and edge hinge parts forming corners of upper and lower sides of the unit structure,
Among the unit ribs constituting the unit structures of the hexagonal structure, the first group unit ribs disposed on one side of the intermediate hinge part and the second group unit ribs disposed on the other side are inclined in different directions from each other. Characterized in that Spoke structure of non-pneumatic tires.
According to claim 4,
A spoke structure of a non-pneumatic tire, characterized in that protruding directions of respective intermediate hinge portions of unit structures adjacent to each other at the upper or lower portions are formed to be different from each other.
According to claim 1,
An outer surface of the spoke structure formed by the shape of the plurality of first radial ribs and an inner surface of the spoke structure formed by the shape of the plurality of second radial ribs have a concavo-convex structure Spokes of a non-pneumatic tire, characterized in that struct.
According to claim 1,
The spoke structure of a non-pneumatic tire, characterized in that the tread portion and the spoke structure are integrally formed.

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