KR20160109795A - Outer wheel with two stage structure and Non-pneumatic wheels with two stage outer wheels - Google Patents

Abstract

The present invention relates to an outer ring having a two-stage structure and a non-pneumatic wheel using the outer ring. More particularly, the outer ring constituting the non-pneumatic wheel is formed into a two-stage structure made of different materials, The present invention relates to an outer ring having a two-stage structure and a non-pneumatic wheel using the outer ring.
The present invention relates to an outer ring for a non-pneumatic wheel, which comprises a ground contact portion which is in contact with the ground and has a coupling portion protruding from the inner surface thereof, and an inner wheel coupling portion which is separated from the ground contact portion by a predetermined distance, .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an outer ring having two-stage structure and a non-

The present invention relates to an outer ring having a two-stage structure and a non-pneumatic wheel using the outer ring. More particularly, the outer ring constituting the non-pneumatic wheel is formed into a two-stage structure made of different materials, The present invention relates to an outer ring having a two-stage structure and a non-pneumatic wheel using the outer ring.

Unlike conventional pneumatic wheels or tires, the non-pneumatic wheel is a new type of wheel that can replace the role of air pressure by using spokes. Compressed air is not used, It is possible to prevent the occurrence of accidents caused by the accident.

In addition, non-pneumatic wheels have been used in recent years because of their smaller number of materials used, their simple design, and their ability to be used in space-free space.

An airless tire is disclosed in Korean Patent Registration No. 10-1032001 as an example of such a non-pneumatic wheel. The main technical structure of the airless tire is as shown in Fig. 1, in which the spoke buffer 30 is divided into a ground contact portion A plurality of radial partitioning walls 31 and 32 extending toward the rotation axis fixing part 20 and having a plurality of projecting parts 31a, 31b, 32a and 32b and arranged radially, 32b of the radial partition walls 31 and 32 are located between the radial partition walls 31 and 32 and are located between the radial partition walls 31 and 32, The ground contact portion 10 and the rotation axis fixing portion 20 are connected to each other through the plurality of connecting partition walls 33 and 34 connecting the ground contact portion 10 and the rotation axis fixing portion 20, respectively.

The configuration is such that the connecting partition walls 33 and 34 are integrally formed between the projections 31a, 31b, 32a and 32b so that the tire is deformed only by the pressure acting on the tire, And the restoring force to be restored to its original shape can be improved when the pressure or the impact is removed. However, since the connecting partition walls 33 and 34 are integrally formed on the radial partition walls 31 and 32, Or repeatedly alternating stresses are applied to the connecting bulkheads 33 and 34 when they are subjected to an impact so that durability is deteriorated due to fatigue and plastic deformation may occur due to cyclic loading .

Also, since the non-pneumatic wheels of a complicated shape are integrally formed in the above-described structure, the manufacturing cost and the maintenance cost are increased, and the manufacturing probability is high.

In addition, since the structure of the ground contacting portion 10 serving as an outer ring and the rotation axis fixing portion 20 serving as an inner ring are formed in a single ring shape, the structure is weak and its use is limited.

In order to solve these problems, Korean Unexamined Patent Publication No. 10-1492815 discloses a high-load unconfined tires and a manufacturing method thereof. The main technical features of the tires are a wheel coupled to axles of an automobile and a heavy equipment, A single tread integrally formed on an outer circumferential surface of the wheel and integrally formed with an outer circumferential surface contacting with the road surface; a double tread formed adjacent to the single tread; a plurality of spaced grooves formed between the single tread and the double tread; Wherein the rubber sheet is made of a rubber material or a synthetic resin material. The method of manufacturing a rubber sheet according to claim 1, Applying an adhesive to attach the raw material to the wheel; Winding a sheet of rubber sheet on a wheel coated with an adhesive; A step of softening the rubber of the wheel wound with the rubber sheet to improve physical properties for processing and heating the rubber sheets so as to increase the adhesive force between the rubber sheets; And a step of molding the wheel wound with the rubber sheet on the mold by inserting it into the mold, characterized in that it is characterized by a method of manufacturing a high-load non-pneumatic tire.

The prior art is characterized by a non-pneumatic tire capable of supporting a high load and a method of manufacturing the tire. However, the structure and manufacturing process of the tire are too complicated, which requires a lot of time and cost.

In addition, since the wheel and the tire are formed integrally with each other, the function of absorbing the impact and the function of dispersing the load are hardly exhibited in the conventional technology, and the entire tire must be replaced when some parts are broken.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the conventional art as described above, and it is an object of the present invention to provide a pneumatic tire, The outer ring having a two-stage structure and the non-pneumatic wheel using the outer ring.

Further, according to the present invention, a double or triple space portion is formed in a coupling portion between an outer ring and an inner ring to allow a deformation of the outer ring to some extent so that the outer ring itself acts as a spring, And a non-pneumatic wheel using the same.

In addition, the present invention can be applied to an internal combustion engine in which the expansion of the outer ring is restricted by the inner ring coupled to the inner side of the outer ring, and the load generated during the driving of the wheel is uniformly distributed in the circumferential direction of the wheel, Another object of the present invention is to provide an outer ring having a stepped structure and a non-pneumatic wheel using the same.

In addition, the present invention provides an outer ring having a two-stage structure that can be assembled and disassembled by separating the outer ring and the inner ring to facilitate manufacture, reduce the defective rate of the product, and reduce manufacturing and maintenance costs, Another object of the present invention is to provide a non-pneumatic tire used.

According to an aspect of the present invention,

The outer ring for a non-pneumatic wheel includes a ground contacting portion which is in contact with the ground and has an engaging portion protruding from the inner side, and an inner wheel engaging portion which is separated from the ground contacting portion by a predetermined distance and is engaged with the engaging portion.

In this case, the ground contact portion is made of a non-metal material, and the inner wheel coupling portion is made of a metal material.

Further, the engaging portion is formed with an insertion groove, and the outer side surface of the inner wheel engaging portion is formed with a protrusion to be fitted into the insertion groove.

In the outer ring for a non-pneumatic wheel, the outer ring includes a ground contact portion contacting the ground, an inner ring coupling portion formed concentrically inside the ground contact portion, and a connection portion connecting the ground contact portion and the inner ring coupling portion And the inner side surface of the inner wheel engaging portion is convex toward the center of the outer ring.

The non-pneumatic wheel according to the present invention is a non-pneumatic wheel including an outer ring and an inner ring, wherein the outer ring includes a ground contact portion of a non-metallic material that contacts the ground, Wherein the inner ring is detachably coupled to the inner side of the outer ring, and the inner ring is coupled to the inside of the outer ring.

At this time, protrusions are formed on the outer surface of the inner ring coupling portion, and coupling portions formed with insertion grooves into which the protrusions are inserted are protruded and formed on the inner surface of the ground contact portion.

The ground contact portion and the inner wheel coupling portion are formed to have the same width.

The inner ring is separated from the outer ring by first and second inner rings, and the inner ring is detachably coupled to the outer ring.

In this case, the first and second inner rings include a wheel shaft coupling portion formed at a central portion thereof, an inner ring coupling portion protruding from the outer side of the wheel shaft coupling portion to couple the first and second inner rings together, And an outer ring coupling portion formed on the outer side of the portion and coupled to the outer ring.

Here, the inner ring fastening portion is formed with a fastening hole, and the first and second inner rings are coupled to each other by fastening means inserted into the fastening hole.

The outer ring coupling portion includes a ring-shaped support portion formed on the outer side of the inner ring coupling portion, an insertion groove formed on the outer side of the support portion to insert the inner wheel coupling portion of the outer ring, and a groove- And a bent portion coupled between the portions.

A first space portion is formed between the outer surface of the inner ring coupling portion and the inner surface of the bent portion, and a second space portion is formed between the inner surface of the inner wheel coupling portion and the outer surface of the support portion.

A third space is formed between the inner surface of the ground contacting portion and the outer surface of the bent portion.

The present invention also provides a non-pneumatic wheel including an outer ring and an inner ring, wherein an inner ring engaging portion is protruded on the inner side of the outer ring, and the inner ring is divided into first and second inner rings The first and second inner rings are formed with an insertion groove into which an inner wheel engaging portion is inserted, and first and second space portions are formed between the inner wheel engaging portion and the insertion groove.

According to the present invention, the outer ring constituting the non-pneumatic wheel is formed into a two-stage structure made of different materials, and the structural strength is improved, so that the support load can be improved.

Further, according to the present invention, it is possible to allow the outer ring to be deformed to some extent by the double or triple space formed in the coupling portion between the outer ring and the inner ring, So that the driving resistance generated from the ground surface can be absorbed when the wheels are driven, thereby reducing noise and vibration of the wheels.

According to the present invention, it is possible to restrict the expansion of the outer ring by the inner ring coupled to the inner side of the outer ring, and to evenly distribute the load generated in driving the wheel in the circumferential direction of the wheel, thereby improving the durability of the wheel Effect.

Further, according to the present invention, the outer ring and the inner ring can be separated from each other, so that assembly and disassembly can be performed, thereby making it easier to manufacture, lowering the defective rate of the product, and reducing manufacturing and maintenance costs .

1 is a front view showing a conventional airless tire;
2 is a perspective view showing an embodiment of an outer ring having a two-stage structure according to the present invention.
3 is a side cross-sectional view of the outer ring shown in Fig.
4 is a perspective view showing another embodiment of an outer ring having a two-stage structure according to the present invention.
5 is a side sectional view of the outer ring shown in Fig.
FIG. 6 is a graph showing the degree of deformation of an outer ring having a two-stage structure according to the present invention and a deformation degree according to an external force applied to a conventional outer ring having a single-layer structure.
7 is a perspective view of a non-pneumatic wheel according to the present invention.
FIG. 8 is an exploded perspective view of the present invention shown in FIG. 7; FIG.
9 is a side cross-sectional view of the present invention shown in Fig.
10 is a side sectional view showing another embodiment of the non-pneumatic wheel according to the present invention.
11 (a) to 11 (c) illustrate test results of stress distribution according to load applied to a non-pneumatic wheel according to the present invention, in comparison with existing integrated wheels.

Hereinafter, preferred embodiments of an outer ring having a two-stage structure and a non-pneumatic wheel using the outer ring according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a perspective view showing one embodiment of an outer ring having a two-stage structure according to the present invention, FIG. 3 is a side sectional view of the outer ring shown in FIG. 2, Fig. 5 is a side sectional view of the outer ring shown in Fig. 4, Fig. 6 is a perspective view showing an outer ring having a two-stage structure according to the present invention and a deformation degree according to an external force applied to a conventional outer- FIG. 7 is a perspective view showing a non-pneumatic wheel according to the present invention, FIG. 8 is an exploded perspective view of the present invention shown in FIG. 7, FIG. 9 is a side sectional view of the present invention shown in FIG. 10 is a side sectional view showing another embodiment of the non-pneumatic wheel according to the present invention, and Figs. 11 (a) to 11 (c) show test results on the stress distribution according to the load applied to the non- Existing integrated type A view showing compared to the extractor.

The present invention has a two-stage structure in which the outer ring constituting the non-pneumatic wheel is formed into a two-stage structure made of different materials so as to improve the structural strength and to improve the support load while maximizing the effect of dispersion of the load As shown in FIG. 2, an outer ring 100 having a two-stage structure according to the present invention includes a ground contact portion 110 having two stages, And an inner-wheel coupling portion 120. [0035]

More specifically, the ground contacting portion 110 is a hollow ring shaped portion having a predetermined thickness and width, which is a portion of the ground contacting portion 110 that is in contact with the ground surface when the wheel 1 is driven.

The engaging portion 112 is integrally formed on the ground contacting portion 110. The engaging portion 112 protrudes from the inner surface of the ground contacting portion 110 so that both side edges of the inner ring engaging portion 120 So that the inner ring 200, which will be described later, is spaced apart from the contact portion 110 by a predetermined distance.

3, the engaging portion 112 is formed to be narrower than the width of the ground contacting portion 110, and is disposed between the ground contacting portion 110 and the inner wheel engaging portion 120 at both sides of the engaging portion 112. [ And an inner ring 200 to be described later is coupled through the space.

The inner ring coupling portion 120 is formed in a ring shape concentric with the ground contact portion 110 so as to be coupled to the coupling portion 112 of the ground contact portion 110, (200) can be combined with each other.

The inner ring coupling portion 120 is coupled to the coupling portion 112 of the ground contact portion 110. The outer ring of the inner ring coupling portion 120 has an insertion groove 112a formed in the coupling portion 112, A protruding portion 122 is formed to be fitted into the protruding portion.

In order to improve the coupling force between the ground contact part 110 and the inner ring coupling part 120, an insertion groove 112a is formed in the coupling part 112 of the ground contact part 110, The outer surface of the coupling part 120 is formed to increase the coupling area of the ground contact part 110 and the inner wheel coupling part 120 by forming the protrusion 122 to be fitted into the insertion groove 112a.

In this case, the ground contacting portion 110 is made of a non-metallic material having elasticity, and the inner wheel coupling portion 120 is made of a metal material to improve the structural rigidity of the outer ring 100.

That is, the ground contacting portion 110 is made of a non-metallic material having elasticity so as to absorb an impact applied to the wheel 1 and to provide an elastic force to the wheel 1 to provide a cushion function, The portion 120 is formed of a metal material in order to increase the structural strength of the wheel 1 and increase the loadable range.

3, the ground contact portion 110 and the inner wheel coupling portion 120 are preferably formed so that their widths are equal to each other. This is because when the wheel 1 is driven, So that the load applied from a direction other than the vertical direction applied can be more stably supported and the stability of the drive of the wheel 1 can be improved when the inner ring 200 to be described later is used in combination.

Therefore, according to the embodiment of the outer ring 100 according to the present invention constructed as described above, the overall structural strength of the outer ring 100 and the wheel 1 can be improved due to the two- Even when the ground contact portion 110 and the inner wheel coupling portion 120 are made of different materials by increasing the coupling area between the ground contact portion 110 and the inner wheel coupling portion 120, And is structured so as to be able to perform rigid bonding by a joining method such as molding or joining.

4 illustrates another embodiment of an outer ring 100 'having a two-stage structure according to the present invention. The outer ring 100' includes a ground contact portion 110 ', an inner ring coupling portion 120', and a connection portion 130 ' The ground contacting portion 110 'is a portion of the ground contact portion 110' contacting with the ground during driving of the wheel 1 and has a hollow ring shape having a predetermined thickness and width.

The inner ring coupling portion 120 'is formed in a ring shape concentric with the ground contact portion 110' so as to be spaced apart from the inner side of the ground contact portion 110 '. The inner ring coupling portion 120' (200) can be combined with each other.

5, the inner surface of the inner ring coupling portion 120 'is convex toward the center of the outer ring 100'. In this case, the inner ring coupling portion 120 ' It is possible to support the high load as compared with the inner side shape, and also the load distribution effect and the cushion effect transmitted along the circumferential direction are also increased, so that the load range capable of supporting the outer ring 100 'can be remarkably increased.

The connection part 130 'is formed between the ground contact part 110' and the inner wheel coupling part 120 ', and the outer ring 100' according to the present invention includes the ground contact part 110 ' And the ground contact portion 110 'and the inner wheel coupling portion 120' so as to be formed of a two-stage structure of the inner ring portion 120 '.

That is, in order that the function of the non-pneumatic wheel 1, which distributes the force to the whole of the wheel 1 when a load is applied to the wheel 1, is required, the structure of the wheel 1 must be robust, It is necessary to increase the thickness of the outer ring 100 or increase the hardness of the material constituting the outer ring 100 or insert another reinforcement member inside the outer ring 100 ' The cushioning function of the wheel 1 is deteriorated and a material cost for producing the non-pneumatic wheel 1 is large. In contrast, in the present invention, as described above, the outer ring 100 ' Stage structure in which the outer wheel 110 'and the inner wheel engaging portion 120' are separated from each other, the structural rigidity of the non-pneumatic wheel 1 can be improved without further construction.

4, the connection unit 130 'includes a plurality of spokes 132' that are spaced apart from each other by a predetermined distance and are connected between the ground contact unit 110 'and the inner wheel coupling unit 120' When the connecting portion 130 'is formed of a plurality of spokes 132', a plurality of spaces are formed between the ground contacting portion 110 'and the inner wheel connecting portion 120' There is an advantage that the cushioning function of the wheel 1 can be improved and the material cost can be reduced while improving the structural rigidity of the outer ring 100 '.

6 (a) to (c) illustrate the deformation degree of the outer ring 100 having the two-stage structure according to the present invention and the deformation degree according to the external force applied to the outer ring 100 having the conventional single- , The outer ring 100 having a two-stage structure according to the present invention has a greater strength to withstand a load than the outer ring made of a conventional single-layer structure, as shown in FIG. 4 (c) And the degree of deformation thereof is reduced to less than half. Therefore, the structural rigidity of the outer ring 100 can be remarkably improved without any additional reinforcing structure or reinforcing member.

In the case where the outer ring 100 is composed of the ground contact portion 110 made of a non-metallic material and the inner wheel coupling portion 120 made of metal and the inner ring coupling portion 120 ' The inner rigidities of the outer rings 100 and 100 'can be further improved.

The non-pneumatic wheel 1 (hereinafter, referred to as 'non-pneumatic wheel 1') using the outer ring of the two-stage structure according to the present invention, as shown in Figs. 7 and 8, And an inner ring 200 that is detachably coupled to the inner side of the outer ring 100. The inner ring 100 is formed of an outer ring 100, Hereinafter, for convenience of description, the description will be made with reference to the outer race 100 corresponding to the first embodiment among the outer race 100 and 100 'having the two-stage structure.

More specifically, the inner ring 200 is detachably coupled to the inside of the outer ring 100 to support the outer ring 100, and at the same time to couple the wheel axles to the inside. The outer ring 100 As shown in Fig.

The diameter of the inner ring 200 is larger than the inner diameter of the outer ring 100 so that a space is formed between the outer ring 100 and the inner ring 200, It is designed to exert the role of spring, that is, cushion function.

The inner ring 200 and the outer ring 100 may be separated from each other by a first inner ring 200a and a second inner ring 200b, So that coupling and separation can be made easier.

The first and second inner rings 200a and 200b include a wheel shaft coupling portion 210, an inner ring coupling portion 220, and an outer ring coupling portion 230, The inner rings 200a and 200b are configured to have the same structure except that the shape of the fastening holes 222 of the inner ring fastening part 220 to be described later is formed to be offset from each other. 200b will be described with reference to FIG.

First, the wheel axle coupling portion 210 is inserted into a wheel shaft (not shown) for driving the wheel 1 inwardly and is formed at the center portion of the second inner ring 200b.

The inner ring coupling part 220 is protruded from the outer side of the wheel shaft coupling part 210 so that the first and second inner rings 200a and 200b can be coupled with each other. A fastening hole 222 through which fastening means such as bolts are inserted is formed through the inner ring fastening part 220 of the second inner rings 200a and 200b.

That is, the fastening holes 222 are formed in the inner ring fastening portions 220 of the first and second inner rings 200a and 200b, respectively, and are fastened by fastening means such as bolts to the first and second inner rings 200a and 200b The fastening hole 222 may be formed with a female screw (not shown) for fastening the fastening means.

In the present invention, the shape of the inner ring coupling part 220 is illustrated as being protruded from the wheel shaft coupling part 210 in a positive (+) form so that the angle between adjacent inner ring coupling parts 220 is 90 degrees But it is needless to say that the angle between adjacent inner ring coupling portions 220 may be set to 60 degrees, 45 degrees, 30 degrees, and the like.

The outer ring coupling part 230 is formed on the outer side of the inner ring coupling part 220 so as to allow the first and second inner rings 200a and 200b to be coupled with the outer ring 100, 232, an insertion groove 234, and a bent portion 236.

More specifically, the support portion 232 is formed in a ring shape on the outer side of the inner ring coupling portion 220 to support a load transmitted from the outer ring 100 and disperse it in the circumferential direction The insertion groove 234 is formed on the outer side of the support portion 232 so that the inner ring coupling portion 120 of the outer ring 100 can be inserted into the insertion groove 234.

The bending portion 236 is bent inwardly from the outer end of the insertion groove 234 and is coupled between the ground contact portion 110 of the outer ring 100 and the inner ring coupling portion 120, To prevent escape.

More specifically, the insertion groove 234 and the bent portion 236 serve to allow the first and second inner rings 200a and 200b to be coupled to the outer ring 100, Similarly, the inner ring coupling portion 120 of the outer ring 100 is inserted into the space formed by the insertion groove 234 formed in the first and second inner rings 200a and 200b, The bending portion 236 formed on each of the inner ring portions 200a and 200b of the outer ring 100 is positioned outside the inner ring coupling portion 120 of the outer ring 100 and the end portion of the coupling portion 112 protrudes from the ground contact portion 110 of the outer ring 100, So that it is possible to prevent the outer ring 100 from being separated from the outer ring 100.

A first space 250 is formed between the outer surface of the inner ring coupling part 120 and the inner surface of the insertion groove 234 or the bending part 236 and the inner space of the inner ring coupling part 120 A second space portion 260 is formed between the inner ring 200 and the inner surface of the support portion 232. The first and second space portions 250, In the combined state of the two.

In other words, the outer ring 100 can be deformed by itself due to the load generated when the non-pneumatic wheel 1 is driven, even when the outer ring 100 is engaged with the inner ring 200, Thereby improving the overall cushioning function of the non-pneumatic wheel (1).

With the above-described configuration, when the cushioning function of the non-pneumatic wheel 1 is improved, noise and vibration generated during driving are further reduced.

The bent portion 236 restricts the expansion of the outer ring 100 by a predetermined amount or more, that is, the expansion beyond the size corresponding to the height of the first space 250, so that the load applied to the wheel 1 is reduced in the circumferential direction So that it can be dispersed.

For example, when a force in a direction perpendicular to the ground surface acts on the wheel 1, a compressive force acts on the wheel 1, so that the height of the wheel 1 is reduced, and the width of the wheel 1 increases accordingly The width of the wheel 1 is increased by the bent portions 236 of the first and second inner rings 200a and 200b coupled to the outer ring coupling portion 120 of the outer ring 100 The deformation of the outer ring 100 in the direction of the outer ring 100 is restricted so that a force for deforming the outer ring 100 is transmitted to the inner ring coupling portion 234 of the outer ring 100 and the bent portion 236 of the first and second inner rings 200a, The cushioning function of the wheel 1 can be improved because the cushioning function is dispersed in the circumferential direction through the engaging portion 112 of the support member 120 and the ground contacting portion 110 and also acts as an elastic force of the wheel 1. [

This can be confirmed from the test results of the stress distribution according to the load applied to the non-pneumatic wheel 1 according to the present invention shown in Figs. 11 (a) to 11 (c) In the case of the non-pneumatic wheel 1 according to the present invention, as the load applied to the wheel 1 increases, the magnitude of the stress dispersed in the circumferential direction increases, and a concentrated load is generated in a specific portion of the wheel 1 And the load can be confirmed to be dispersed throughout the wheel 1. In contrast to the conventional integrated wheel shown in Fig. 11 (b), even if the load applied to the wheel increases, the load The load is concentrated only at a specific portion of the wheel, that is, at a portion of the shaft connected to the lower portion of the wheel shaft, resulting in poor durability.

As shown in Fig. 11 (c), the non-pneumatic wheel 1 according to the present invention exhibits a remarkably large change in displacement due to a load change as compared with the conventional integrated wheel, It can be confirmed that the function is significantly improved as compared with the conventional one.

9, between the inner side surface of the ground contact portion 110 of the outer ring 100 and the outer side surface of the bent portion 236 of the first and second inner rings 200a and 200b, The third space 150 is formed to allow a certain degree of shrinkage of the outer ring 100 due to a load generated when the wheel 1 is driven so as to improve the cushioning function of the wheel 1 So that it is possible to absorb the driving resistance generated from the ground during driving of the wheel 1, thereby reducing the vibration of the wheel 1 and improving durability.

10, according to another embodiment of the non-pneumatic wheel 1 according to the present invention, the outer ring 100 has a two-stage structure including a ground contact portion 110 and an inner ring coupling portion 120 The inner ring coupling portion 120 is formed so that both side surfaces of the inner ring coupling portion 120 protrude to the outside of the ground contact portion 110 and are inserted into the insertion groove 234 formed in the first and second inner rings 200a and 200b, .

The first and second inner rings 200a and 200b are coupled to each other by a fastening means such as a bolt. The detailed structure of the inner ring coupling portion 120 and the first and second The first and second space portions 250 and 260 are formed between the insertion grooves 234 of the inner rings 200a and 200b so that the outer ring 100 can act as a spring by itself. The detailed description thereof will be omitted.

Therefore, according to the above-described outer ring 100 and 100 'having a two-stage structure according to the present invention and the non-pneumatic wheel 1 using the same, the outer ring 100 constituting the non-pneumatic wheel 1 can be made of different materials The inner ring 100 and the inner ring 200 are formed in a two-tiered structure to improve the structural strength, thereby improving the support load. By the double or triple space formed in the joint between the outer ring 100 and the inner ring 200, The cushioning function can be improved by allowing the outer ring 100 to act as a spring itself by allowing the deformation to a certain extent so that the driving resistance generated from the ground during driving of the wheel 1 can be absorbed, It is possible not only to reduce the noise and vibration of the outer ring 100 but also to restrict the expansion of the outer ring 100 by the inner ring 200 coupled to the inner side of the outer ring 100, The circumference of the wheel (1) And the outer ring 100 and the inner ring 200 can be separated and assembled and disassembled. This makes it easier to manufacture and at the same time reduces the defective product, And the cost can be reduced.

Although the preferred embodiments of the present invention have been described in connection with the preferred embodiments of the present invention, the present invention is not limited to the above-described embodiments. The non-pneumatic wheels 1 according to the present invention may be used in various fields such as wheels for casters, tires for automobiles, It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention.

The present invention relates to an outer ring having a two-stage structure and a non-pneumatic wheel using the outer ring. More particularly, the outer ring constituting the non-pneumatic wheel is formed into a two-stage structure made of different materials, The present invention relates to an outer ring having a two-stage structure and a non-pneumatic wheel using the outer ring.

1: (non-pneumatic) wheel 100, 100 ': outer ring
110, 110 ': ground contacting portion 112:
112a: insertion groove 120, 120 ': inner ring coupling portion
122: protrusion 130 ': connection
150: third space part 200: inner ring
200a: first inner ring 200b: second inner ring
210: wheel axle coupling part 220: inner ring coupling part
222: fastening hole 230: outer ring coupling portion
232: support portion 234: insertion groove
236: bent portion 250: first space portion
260: second space portion

Claims (14)

In the outer ring for a non-pneumatic wheel,
Wherein the outer ring includes a ground contact portion which is in contact with the ground and has a coupling portion protruding from the inner side surface thereof and an inner wheel coupling portion which is coupled to the coupling portion so as to be spaced apart from the ground contacting portion by a predetermined distance.
The method according to claim 1,
Wherein the ground contact portion is made of a non-metallic material, and the inner wheel coupling portion is made of a metal material.
The method according to claim 1,
Wherein the engaging portion is formed with an insertion groove and the outer side surface of the inner wheel engaging portion is formed with a protrusion which is fitted into the insertion groove.
In the outer ring for a non-pneumatic wheel,
Wherein the outer ring includes a ground contact portion contacting the ground, an inner ring coupling portion formed concentrically inside the ground contact portion, and a connection portion connecting the ground contact portion and the inner ring coupling portion,
And the inner side surface of the inner wheel engaging portion is convex toward the center of the outer ring.
A non-pneumatic wheel comprising an outer ring and an inner ring,
Wherein the outer ring has a two-tiered structure including a ground contact portion of a nonmetallic material that is in contact with the ground, and a metal inner ring coupling portion that is spaced apart from the ground contact portion by a predetermined distance,
Wherein the inner wheel is detachably coupled to the inner side of the outer ring.
6. The method of claim 5,
Wherein the outer surface of the inner wheel engaging portion is formed with a protrusion and the inner surface of the ground contacting portion is formed with an engaging portion formed with an insertion groove into which the protrusion is inserted.
6. The method of claim 5,
Wherein the ground contacting portion and the inner wheel coupling portion are formed to have the same width.
6. The method of claim 5,
Wherein the inner wheel is divided into first and second inner rings coupled from both sides of the outer ring, and is detachably coupled to the outer ring.
9. The method of claim 8,
An inner wheel fastening part protruding from the outer side of the wheel axle fastening part to fasten the first and second inner rings to each other; And an outer ring coupling portion formed on the inner ring and coupled to the outer ring.
10. The method of claim 9,
Wherein the inner ring coupling portion is formed with a coupling hole and the first and second inner rings are coupled to each other by coupling means inserted into the coupling hole.
10. The method of claim 9,
The outer ring coupling portion being formed on the outer side of the inner ring coupling portion, the ring-shaped support portion formed on the outer side of the inner ring coupling portion, the insertion groove into which the inner wheel coupling portion of the outer ring is inserted, And a bending portion that is coupled to the outer wheel.
12. The method of claim 11,
Wherein a first space portion is formed between an outer side surface of the inner ring coupling portion and an inner side surface of the bent portion, and a second space portion is formed between an inner side surface of the inner ring coupling portion and an outer side surface of the support portion.
12. The method of claim 11,
And a third space portion is formed between the inner surface of the ground contact portion and the outer surface of the bent portion.
A non-pneumatic wheel comprising an outer ring and an inner ring,
An inner wheel engaging portion is protrudingly formed on the inner side of the outer ring,
The inner ring is divided into first and second inner rings which are coupled to each other by fastening means,
Wherein the first and second inner rings are formed with an insertion groove into which an inner wheel engaging portion is inserted and a first and a second space portion are formed between the inner wheel engaging portion and the insertion groove.

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