KR101450475B1 - Non pneumatic tire - Google Patents

Abstract

The present invention relates to a non-pneumatic tire which can support vehicle weight without using pneumatic pressure and can be mounted on an ordinary tire wheel, thereby replacing a common radial tire without replacing an existing tire wheel. The non-pneumatic tire includes a rubber body disposed at a circumference of a tire wheel to be formed in a donut shape surrounding the circumference of the tire wheel; a spoke layer having a plurality of ring-shaped spokes coupled to a circumference of a frame portion of the rubber body; a tread cap coupled on the spoke layer to surround the spoke layer; and a plurality of rim support assemblies to fix the rubber body to the tire wheel. The rubber body includes a first side wall portion disposed at a circumference of a first rim of the tire wheel; a second side wall portion disposed at a circumference of a second rim of the tire wheel; and a frame portion connecting an outer circumference portion of the first side wall portion and an outer circumference portion of the second side wall portion. The rim support assemblies are simultaneously coupled to an inner circumference portion of the first side wall portion and an inner circumference portion of the second side wall portion to simultaneously press the first side wall portion toward the first rim and press the second side wall portion toward the second rim.

Description

[0002] Non-pneumatic tires [0003]

The present invention relates to a tire for an automobile, and more particularly, to a tire for an automobile, which can support a load of an automobile without using air pressure and can be mounted on a general tire wheel to replace a conventional radial tire The present invention relates to a non-pneumatic tire which can be used for a tire.

In general, automotive tires can be classified into radial tires, bias tires, solid tires, and the like depending on the structure. Among them, radial tires, that is, pneumatic tires, are mostly used in automobiles other than passenger cars and special purposes. The pneumatic tire uses the pressure of the air filled in the tire to support the load of the vehicle and to absorb the impact from the road surface.

When such an pneumatic tire is damaged by an impact from the outside during driving, the air pressure is suddenly lowered, so that the vehicle can not be controlled and an accident is caused. In order to exert the performance of the pneumatic tire, there is an inconvenience in management that the air pressure must be checked from time to time. In addition, pneumatic tires have a complicated structure, a large number of manufacturing steps such as a multistage, and manufacturing problems in which a large amount of harmful substances are discharged.

As an alternative to the problem of pneumatic tires, a non-pneumatic tire capable of elastically supporting the vehicle without using air pressure has been developed. Most of the non-pneumatic tires support the load of the vehicle with an elastic support placed between the rim and the tread, while maintaining the shape of the existing pneumatic tire, and absorb the impact from the road surface.

Unlike pneumatic tires, these non-pneumatic tires can greatly reduce production costs by simplifying materials and processes, as well as significantly reducing energy and hazardous materials during production. And unlike air pressure type, it does not use compressed air at all, so it is free from the risk of accident that may occur during driving due to loss or lack of air pressure. Further, it is possible to prevent a standing wave shape generated in the pneumatic tire and has an advantage that the rotation resistance can be greatly improved.

At present, non-pneumatic tires having various structures have been proposed. Japanese Unexamined Patent Publication No. 2011-0183894 (published on September 22, 2011) and Japanese Unexamined Patent Application Publication No. 2012-0035792 (published on February 23, 2012) , Korean Patent Publication No. 2012-0065692 (published on June 21, 2012), Korean Patent Publication No. 2012-0069988 (published on June 29, 2012), etc., are disclosed.

As described above, although a variety of non-pneumatic tires have been proposed at present, there is a continuing effort to develop a non-pneumatic tire having improved structure and performance.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a tire capable of replacing a general radial tire without replacing an existing tire wheel, And a non-pneumatic tire which is easy to mount and detach.

According to an aspect of the present invention, there is provided a non-pneumatic tire including a rubber body disposed around a tire wheel and surrounding a periphery of the tire wheel, the ring body having a plurality of ring- A spoke layer having a spoke, a tread cap coupled to the spoke layer and surrounding the spoke layer, and a plurality of rim support assemblies for securing the rubber body to the tire wheel. Wherein the rubber body comprises a first sidewall portion disposed around a first rim of the tire wheel, a second sidewall portion disposed around a second rim of the tire wheel, an outer circumferential portion of the first sidewall portion, And a skeleton connecting the outer diameter of the second sidewall portion. Wherein the rim support assembly is configured to compress the first sidewall portion to the first rim and to compress the second sidewall portion to the second rim and to compress the second sidewall portion to the second rim, A first rim support member coupled to the inner diameter portion of the first sidewall portion and the inner diameter portion of the second sidewall portion and having one end engaged with the inner diameter portion of the first sidewall portion and contacting the first rim of the tire wheel, And a second rim support member coupled to an inner diameter portion of the second side wall portion and contacting the second rim of the tire wheel. Wherein the first rim support and the second rim support are each pivotally coupled by a pivot axis and the first rim support is resiliently deformed such that the other end of the first rim support is fixed to the second rim support, At the same time, the second rim support member is elastically deformed so that the other end of the second rim support member is fixed to the first rim support member so that one end of the first rim support member is pressed toward the first rim of the tire wheel, One end of the rim support is pressed toward the second rim of the tire wheel.

A first fixing hook is provided at the other end of the first rim support and a fixing groove is formed at the middle of the second rim support to engage with the first fixing hook and a second fixing hook is provided at the other end of the second rim support, And a fixing groove in which the second fixing hook is fitted is formed in the middle of the first rim support.

The non-pneumatic tire according to the present invention not only has the advantages of a general non-pneumatic tire but also can stably support the load of the vehicle and can be mounted on a general tire wheel, Can be replaced.

Further, the non-pneumatic tire according to the present invention has a simple structure and can be easily mounted on a tire wheel, thereby reducing replacement work time and replacement work cost.

In addition, the non-pneumatic tire according to the present invention can be used semi-permanently because the tread cap, which is abraded by the road surface, can be reused by removing only the tread cap which is replaced with a new tire, and can reduce the maintenance cost of the vehicle to the user.

1 is a front sectional view showing a state in which a non-pneumatic tire according to an embodiment of the present invention is coupled to a tire wheel.
2 is a front sectional view showing a state in which a non-pneumatic tire according to an embodiment of the present invention is fixed to a tire wheel.
3 is a side view showing a state in which a non-pneumatic tire according to an embodiment of the present invention is fixed to a tire wheel.
4 is a plan view of a non-pneumatic tire according to an embodiment of the present invention.
5 is a perspective view illustrating a rim support assembly of a non-pneumatic tire according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail.

While the present invention has been described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. . Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

FIG. 1 is a front sectional view showing a state in which a non-pneumatic tire according to an embodiment of the present invention is bonded to a tire wheel, and FIG. 2 is a cross- FIG. 3 is a side view showing a state in which a non-pneumatic tire according to an embodiment of the present invention is fixed to a tire wheel, and FIG. 4 is a plan view showing a non-pneumatic tire according to an embodiment of the present invention.

1 to 4, a non-pneumatic tire 20 according to an embodiment of the present invention includes a donut-shaped rubber 20 disposed around a tire wheel 10 and surrounding the circumference of the tire wheel 10, A spoke layer 28 having a body 22 and a plurality of ring shaped spokes 29 attached to the periphery of the rubber body 22 and a tread cap 28 attached to the spoke layer 28 and surrounding the spoke layer 28 And a plurality of rim support assemblies 32 coupled to the rubber body 22 for pressing and fixing the rubber body 22 to the tire wheel 10. The non-pneumatic tire 20 can be mounted on the general tire wheel 10, thereby replacing the conventional radial tire without replacing the existing tire wheel 10, and being easy to mount and detach.

The rubber body 22 includes a first side wall portion 23 disposed around the first rim 12 of the tire wheel 10 and a second side wall portion 23 disposed around the second rim 14 of the tire wheel 10 2 side wall portion 24 and a skeleton portion 25 connecting the outer diameter portion 23a of the first side wall portion 23 and the outer diameter portion 24a of the second side wall portion 24. In the rubber body 22, the first sidewall 23, the second sidewall portion 24, and the skeleton portion 25 are integrally formed of rubber having elasticity.

Each of the first side wall portion 23 and the second side wall portion 24 is provided with a plurality of through holes 26. These through holes 26 serve to buffer shocks applied from the road surface on which the non-pneumatic tire 20 is placed or from the tire wheel 10 to the side wall portions 23 and 24. The heat inside the non-pneumatic tire 20 can be smoothly discharged to the outside of the non-pneumatic tire 20 through these through holes 26. When the non-pneumatic tire 20 is mounted on the tire wheel 10 or separated from the tire wheel 10, the operator enters the hand or tool into the non-pneumatic tire 20 through these through holes 26 The rim support assembly 32 for pressing and fixing the rubber body 22 to the tire wheel 10 can be operated.

The spoke layer 28 surrounds the skeleton 25 of the rubber body 22 and connects the rubber body 22 and the tread cap 30 so that the shock between the rubber body 22 and the tread cap 30 Respectively. The spoke layer 28 serves to reinforce the radial thickness of the non-pneumatic tire 20. The spoke layer 28 is comprised of a plurality of ring-shaped spokes 29 wound around the framework 25 of the rubber body 22.

The plurality of spokes 29 are made of elastic rubber, and as shown, some may be arranged so as to form a group and spaced apart from the other spoke groups. Of course, the plurality of spokes 29 may be uniformly disposed at the skeleton 25 of the rubber body 22 at regular intervals, or may completely cover the skeleton 25 of the rubber body 22. The plurality of spokes 29 may be joined to the rubber body 22 and the tread cap 30 through a variety of methods, such as a strong adhesive bonding method.

The tread cap 30 is coupled over the spoke layer 28 to cover the spoke layer 28 as a portion directly tangent to the road surface. Various tread patterns may be provided on the outer circumferential surface of the tread cap 30. The tread cap 30 is made of rubber having elasticity like the rubber body 22 or the spokes 29 and can be coupled to the spoke layer 28 through various methods such as a bonding method using a strong adhesive. The tread cap 30 is a portion that is in direct frictional contact with the road surface and wears faster than other components that make up the non-pneumatic tire 20. Thus, if the degree of wear of the tread cap 30 is increased, the tread cap 30 is removed from the spoke layer 28 and replaced with a new one without leaving the rubber body 22 or the spoke layer 28, Can be saved.

1, 2 and 5, the rim support assembly 32 presses the first sidewall portion 23 of the rubber body 22 toward the first rim 12 of the tire wheel 10 The rubber body 22 is pressed against the tire rim 12 by pressing the second sidewall portion 24 against the second rim 14 and pressing the second sidewall portion 24 against the second rim 14, As shown in FIG. The rim support assembly 32 includes a first rim support 33 coupled to the inner diameter portion 23b of the first sidewall portion 23 of the rubber body 22, And a second rim support (40) coupled to the second rim support (24b). The rim support assembly 32 may be disposed at a constant spacing or in a specific pattern along the inner diameter portion 23b of the first sidewall portion 23 and the inner diameter portion 24b of the second sidewall portion 24 . For example, twelve rim support assemblies 32 can be disposed at intervals of 30 degrees along the inner diameter portion 23b of the first sidewall portion 23 and the inner diameter portion 24a of the second sidewall portion 24.

The first rim support 33 includes a first body engagement portion 34 to which the first sidewall portion 23 of the rubber body 22 is coupled and a second body engagement portion 34 that is in close contact with the first rim 12 of the tire wheel 10 A first bead portion 35 provided at one end of the first body coupling portion 34 and a first coupling portion 36 extending from the other end of the first body coupling portion 34. A first fixing hook 37 is provided at an end of the first connection part 36 and is fitted into a fixing groove 45 formed in the middle of the second rim support 40. The first body coupling portion 34 is provided with a fixing groove 38 into which a second fixing hook 44 of a second rim support base 40 to be described later is fitted. The first bead portion 35 has a curved outer surface corresponding to the groove portion of the first rim 12 so as to stably adhere to the concave groove portion of the first rim 12.

The first connection part 36 has a width smaller than that of the first body connection part 34 and is disposed at a side of the first body connection part 34 and extends from the other end of the first body connection part 34 . The first fixing hook 37 provided at the end of the first connection part 36 is fitted into the fixing groove 45 of the second rim support 40 or the other fixing groove 45 So that it can not be easily separated from the fixing groove 45.

 The first bead portion 35 of the first wheel support portion 33 is engaged with the first bead portion 35 of the tire wheel 10 in a state where the first side wall portion 23 of the rubber body 22 is engaged with the first body coupling portion 34. [ The first sidewall 23 can be firmly fixed to the first rim 12 by being pressed against the first rim 12. The first rim support 33 is made of a highly resilient rubber and can be joined to the first side wall 23 of the rubber body 22 through a variety of methods, such as a strong adhesive bonding method. The first rim support 33 is pivotally coupled to the second rim support 40. An insertion hole 39 is formed in the middle of the first connection 36 of the first rim support 33 to receive the pivot shaft 48 .

The second rim support 40 is constructed in the same manner as the first rim support 33 and is supported by the first rim support 33 by means of the pivot shaft 48 so as to intersect with the first rim support 33, Lt; / RTI > The second rim support 40 includes a second body engagement portion 41 to which the second sidewall portion 24 of the rubber body 22 is coupled and a second body engagement portion 41 that is in close contact with the second rim 14 of the tire wheel 10 A second bead portion 42 provided at one end of the second body coupling portion 41 and a second coupling portion 43 extending from the other end of the second body coupling portion 41. A second fixing hook 44 is provided at an end of the second connection portion 43 and is fitted into a fixing groove 38 formed in the middle of the first rim support 33. The second body coupling portion 41 is provided with a fixing groove 45 into which the first fixing hook 37 of the first rim support member 33 is fitted. The second bead portion 42 has a curved outer surface corresponding to the groove portion of the second rim 14 so as to stably adhere to the concave groove portion of the second rim 14.

The second connector 43 has a width smaller than that of the second body connector 41 and is disposed at a side of the second body connector 41 and extends from the other end of the second body connector 41 . The second fixing hook 44 provided at the end of the second connecting portion 43 is fitted into the fixing groove 38 of the first rim support 33 or the structure shown in FIG. So that it can not be easily separated from the fixing groove 38.

 The second rim support 40 is configured such that the second bead portion 42 is engaged with the second side wall portion 24 of the tire body 10 in a state where the second side wall portion 24 of the rubber body 22 is engaged with the second body engagement portion 41, The second side wall portion 24 can be firmly fixed to the second rim 14 by being pressed onto the second rim 14. [ The second rim support 40 is made of a highly resilient rubber and can be joined to the second side wall portion 24 of the rubber body 22 through a variety of methods, such as a strong adhesive bonding method. An insertion hole 46 through which the pivot shaft 48 is inserted is provided in the middle of the second connecting portion 43 of the second rim support 40.

The non-pneumatic tire 20 according to the present invention can be firmly fixed to the tire wheel 10 by a plurality of rim support assemblies 32. A method of fixing the non-pneumatic tire (20) to the tire wheel (10) is as follows.

First, as shown in Fig. 1, the first fixing hook 37 of the first rim support 33 and the second fixing hook 44 of the second rim support 40 are fixed to the fixing grooves 45, The non-pneumatic tire 20 is joined to the tire wheel 10 with the rim support assembly 32 loosened without being inserted into the tire.

2, the first fixing hook 37 of the first rim support 33 is fitted into the fixing groove 45 of the second rim support 40, and at the same time, the second rim support 40 Is fitted into the fixing groove 38 of the first rim support base 33. The second fixing hook 44 of the first rim support base 33 is inserted into the fixing groove 38 of the first rim support base 33. The operator enters the hand or tool into the rubber body 22 through the through hole 26 of the rubber body 22 and moves the end of the first connecting portion 36 of the first rim support 33 to the second rim support The first fixing hook 37 of the first rim support 33 is engaged with the first fixing hook 37 of the second rim support 40 by elastically deforming the first rim support 33 slightly toward the second body joining part 41 of the first rim support 40 It can be fitted into the fixing groove 45. At the same time, by slightly elastically deforming the second rim support 40 by pushing the end of the second connecting portion 43 of the second rim support 40 toward the first body joining portion 34 of the first rim support 33, The second fixing hook 44 of the second rim support 40 can be fitted into the fixing groove 38 of the first rim support 33.

The first fixing hook 37 of the first rim support 33 is fitted into the fixing groove 45 of the second rim support 40 and the second fixing hook 44 of the second rim support 40 The first rim support 33 and the second rim support 40 are resiliently deformed to engage the opponent with the first rim of the tire wheel 10 12) or the second rim (14). The first rim support 33 presses the second rim support 40 toward the second rim 14 of the tire wheel 10 to disengage the second bead 42 of the second rim support 40 2 rim 14 and the second rim support 40 presses the first rim support 33 toward the first rim 12 of the tire wheel 10 so as to press the first rim support 33 The bead portion 35 is pressed onto the first rim 12.

A plurality of rim support assemblies 32 coupled to the rubber body 22 are pressed against the first rim 12 and the second rim 14 of the tire wheel 10, One side wall portion 23 and the second side wall portion 24 are firmly fixed to the first rim 12 and the second rim 14. The action of the rim support assembly 32 is such that the tube received within a conventional tire expands and presses the bead of the tire against the rims 12 and 14 of the tire wheel 10 to securely fix the tire to the tire wheel 10 .

As described above, the non-pneumatic tire 20 according to the present invention not only has the advantages of a general non-pneumatic tire but also can stably support the load of the vehicle and can be mounted on a general tire wheel 10, There is an effect that the general radial tire can be replaced without replacing the tire wheel 10 of the tire.

Also, the non-pneumatic tire 20 according to the present invention has a simple structure and can be easily mounted on the tire wheel 10, thereby reducing replacement work time and replacement work cost.

In addition, the non-pneumatic tire 20 according to the present invention can be used semi-permanently because the tread cap 30, which is abraded by the road surface, can be removed and reused for replacement, thereby reducing the maintenance cost of the vehicle.

The concrete structure of the rubber body 22, the spoke layer 28, the tread cap 30, and the rim support assembly 32 is not limited to the illustrated ones and may be variously modified. The coupling structure of the rubber body 22 and the spoke layer 28 and the coupling structure of the spoke layer 28 and the tread cap 30 and the coupling structure of the rim support assembly 32 and the rubber body 22 Structure.

10: Tire wheel 12, 14: 1st, 2nd rim
20: non-pneumatic tire 22: rubber body
23, 24: first and second side walls 25:
26: through hole 28: spoke layer
29; Spoke 30: Tread cap
32: rim support assembly 33, 40: first and second rim supports
34, 41: first and second body coupling portions 35, 42: first and second bead portions
36, 43: first and second connecting portions 37, 44: first and second hook portions
38, 45: fixing groove 39, 46: insertion hole
48: Pivot axis

Claims (2)

A first side wall portion disposed around the first rim of the tire wheel, the first side wall portion being disposed around the tire wheel and surrounding the tire wheel, the first side wall portion being disposed around the second rim of the tire wheel; A rubber body having a second side wall portion and a skeleton connecting the outer diameter portion of the first side wall portion and the outer diameter portion of the second side wall portion;
A spoke layer having a plurality of ring-type spokes coupled to the framework of the rubber body;
A tread cap coupled to the spoke layer and surrounding the spoke layer; And
Wherein the first sidewall portion is pressed toward the first rim to compress the first sidewall portion to the first rim and the second sidewall portion is pressed to the second rim to press the first sidewall portion to the second rim, And a plurality of rim support assemblies simultaneously coupled to the inner diameter portion and the inner diameter portion of the second sidewall portion,
The rim support assembly includes a first rim support member, one end of which is engaged with an inner diameter portion of the first sidewall portion and is in contact with a first rim of the tire wheel, and a second rim support member, one end of which is engaged with the inner diameter portion of the second sidewall portion, And a second rim support abutting the second rim of the second rim support,
Each of the first and second rim supports being pivotally coupled by a pivot axis,
The first rim support is elastically deformed to fix the other end of the first rim support to the second rim support and the second rim support is elastically deformed so that the other end of the second rim support rests on the first rim support Wherein one end of the first rim support is pressed toward the first rim of the tire wheel and one end of the second rim support is pressed toward the second rim of the tire wheel.
The method according to claim 1,
A first fixing hook is provided on the other end of the first rim support and a fixing groove is formed in the middle of the second rim support to fit the first fixing hook,
Wherein a second fixing hook is provided at the other end of the second rim support and a fixing groove is provided at the middle of the first rim support to fix the second fixing hook.

Images