KR101909635B1 - Variable wheel - Google Patents

Abstract

The variable wheel is started. A variable wheel according to the present invention comprises: a circular tire; A sliding frame formed along the inner circumferential surface of the tire to support the tire and including a first sliding portion and a first sliding portion and a second sliding portion moving relative to the first sliding portion and the first sliding portion; A center axis formed at the center of the tire and the sliding frame; And a sliding rib that connects the sliding frame and the central shaft to each other and is repeatedly formed at regular intervals along the circumferential direction of the central axis, the sliding rib including: an outer rib coupled to the sliding frame side; An inner rib coupled to the central axis and slidably moving relative to the outer rib; And an elastic portion that exerts an elastic force in a direction in which the outer rib and the inner rib are apart from each other. According to the present invention, since the sliding frame is composed of the first sliding portion and the second sliding portion and the sliding rib is composed of the outer rib and the inner rib and is elastically supported, the diameter of the sliding frame is changed according to the air pressure change inside the tire, It is possible to compensate for changes in the air pressure, thereby achieving the effects of improving fuel economy, preventing tire wear, and improving ride comfort.

Description

Variable wheel {VARIABLE WHEEL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable wheel, and more particularly, to a variable wheel capable of maintaining air pressure inside a tire.

When a tire is mounted on a vehicle and mounted on a vehicle, the proper air pressure should be maintained for each vehicle type. If the tire pressure is insufficient, problems such as deterioration in ride comfort, lowered driving stability, and uneven wear of the tire may be caused.

The tires are a major factor in determining the running condition of a vehicle. Since the characteristics of braking performance and running performance of such tires vary greatly according to the air pressure, the tire pressure of the tire mounted on the vehicle is appropriate It is necessary to check it so that it can be maintained.

However, since the air shortage state can not be accurately recognized until the air pressure is checked, the vehicle is operated in an improper state.

Korean Patent Laid-Open Publication No. 10-1999-0055570 discloses a "tire air pressure regulating apparatus using centrifugal force ", and specifically discloses a cylinder in which an inner air hole is formed in a tire rim installed at the center of a tire rubber And the piston moving upward and downward is connected to the inner side of the cylinder so as to be connected to the elastic means. Thus, the stiffness of the tire can be prevented by adjusting the air pressure of the tire in the tire itself, It is described that the metal plate can serve as an auxiliary tire even at the time of breakage.

However, in the case of such an air pressure regulating device, a plurality of internal air ports and external air ports are formed with the piston as a boundary, and it is difficult to maintain the airtightness through the piston and thus the air inside the tire is discharged through the external air port, There is a risk that the internal air pressure is significantly reduced.

Furthermore, the number of the inner air holes, the outer air holes and the pistons must be increased to increase the risk, which requires improvement to more effectively control the air pressure inside the tire.

(0001) Korean Patent Publication No. 10-1999-0055570 (Publication Date: July 15, 1999)

An object of the present invention is to provide a variable-type wheel that can effectively compensate for a change in air pressure by compressing a tire when the air pressure inside the tire decreases.

The object is achieved by a tire comprising: a circular tire; A sliding frame formed along the inner circumferential surface of the tire to support the tire and including a first sliding portion and a second sliding portion moving relative to the first sliding portion; A center axis formed at the center of the tire and the sliding frame; And a sliding rib which connects the sliding frame and the central shaft to each other and repeatedly formed at regular intervals along the circumferential direction of the central axis, the sliding rib comprising: an outer rib coupled to the sliding frame; An inner rib coupled to the central axis and slidably moving relative to the outer rib; And an elastic portion that exerts an elastic force in a direction in which the outer rib and the inner rib are moved away from each other.

The outer rib has an end formed in a pipe shape and is provided with a receiving space therein, the inner rib end is inserted into the receiving space, and the elastic part is made to abut the end of the inner rib in the receiving space.

A first engaging protrusion having a reduced diameter is formed in the outer rib end and a second engaging protrusion is formed in the end of the inner rib to increase the diameter of the inner rib end, do.

According to the present invention, since the sliding frame is composed of the first sliding portion and the second sliding portion and the sliding rib is composed of the outer rib and the inner rib and is elastically supported, the diameter of the sliding frame is changed according to the air pressure change inside the tire, It is possible to compensate for changes in the air pressure, thereby achieving the effects of improving fuel economy, preventing tire wear, and improving ride comfort.

1 shows a variable wheel according to an embodiment of the present invention,
FIG. 2 is a view showing a deformed state of the sliding frame in the variable wheel shown in FIG. 1;
FIG. 3 is an enlarged view of a sliding rib in the variable wheel shown in FIG. 1. FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.

FIG. 1 is a view showing a variable wheel 1 according to an embodiment of the present invention, FIG. 2 is a view showing a deformed state of the sliding frame 20 in the variable wheel 1 shown in FIG. 1, 3 is an enlarged view of the sliding rib 40 in the variable wheel 1 shown in Fig.

A variable wheel 1 according to the present invention comprises a tire 10, a sliding frame 20, a center shaft 30, and a sliding rib 40.

The tire 10 is a portion that is fitted on the outer periphery of the variable wheel 1 and is made of rubber and filled with air.

The sliding frame 20 is formed in a circular shape along the inner circumferential surface of the tire 10 and is formed in close contact with the inner circumferential surface of the tire 10.

The sliding frame 20 is formed so that the overall diameter thereof can be varied. For this purpose, the sliding frame 20 is divided into a first sliding portion 21 and a second sliding portion 22.

The first sliding portion 21 and the second sliding portion 22 are repeatedly formed in a plurality of directions along the circumferential direction and are combined together to constitute the sliding frame 20.

As shown in FIG. 3, the first sliding portions 21 are connected to each other in such a manner that end portions of the first sliding portions 21 closely contact with each other to form the overall shape of the sliding frame 20. In this state, the tire 10 is coupled to the sliding frame 20, and air is injected so that the air pressure inside the tire 10 is in an appropriate state. That is, in the initial state in which the tire 10 and the sliding frame 20 are engaged and air pressure in an appropriate state is injected into the tire 10, the second sliding portion 22 does not appear outside. The air pressure of the tire 10 is in parallel with the elastic force of the elastic portion 43.)

The second sliding portion 22 is movable relative to the first sliding portion 21. Both ends of the second sliding portion 22 are inserted into the first sliding portion 21 to be slidable . The total diameter of the sliding frame 20 increases when the first sliding part 21 and the second sliding part 22 move relative to each other so that the second sliding part 22 is exposed to the outside.

The center shaft 30 is formed at the center of the tire 10 and the sliding frame 20.

The sliding ribs 40 are repeatedly formed at regular intervals along the circumferential direction of the central shaft 30, connecting the sliding frame 20 and the central shaft 30 to each other. The sliding ribs 40 are formed in a direction orthogonal to the tangent of the wheel circumference.

The sliding rib 40 has a variable overall length and includes an outer rib 41, an inner rib 42, and an elastic portion 43 for this purpose.

The outer ribs 41 are fixedly coupled to the sliding frame 20, and are fixedly coupled to the first sliding portion 21 in particular. The end of the outer rib 41, that is, the end facing the center is formed in the shape of a pipe, and a receiving space 44 is provided therein.

A first stopping protrusion 45 having a reduced diameter is formed at an end of the outer rib 41.

The inner ribs 42 are fixedly coupled to the center shaft 30 and are slidable in the state of the outer ribs 41. The ends of the ribs 42 are inserted into the receiving space 44 of the outer ribs 41 and are coupled. The inner ribs 42 are tightly fitted to the outer ribs 41 so as to be spaced apart from each other in the direction of slide movement.

A second latching protrusion 46 having an increased diameter is formed at the end of the inner rib 42. The second engaging jaw 46 is engaged with the first engaging jaw 45 so that the inner rib 42 is not separated from the outer rib 41 and the longest length of the sliding rib 40 The length is limited.

3, the elastic portion 43 is located inside the accommodation space 44 of the outer rib 41, and the elastic portion 43 is located at a position where the outer rib 41 and the inner rib 42 are spaced apart from each other Direction to support both of them. The elastic portion 43 may be formed in the same shape as the coil spring.

The elastic ribs 43 elastically support the outer ribs 41 and the inner ribs 42 so that the outer ribs 41 are pressed outward with respect to the central axis 30, (Fig. 2 (b)) in which the diameter is expanded.

At this time, the elastic force of the elastic portion 43 (the elastic force in the compressed state) is made to correspond to the proper air pressure in the tire 10. That is, the tire 10 is coupled to the sliding frame 20 as shown in FIG. 2 (a), and the air pressure inside the tire 10 and the elastic portion 43 are parallel to each other.

When the tire 10 is initially mounted and the air pressure of the tire 10 is in an appropriate state, the elastic force of the elastic portion 43 and the air pressure inside the tire 10 are parallel to each other, The elasticity of the elastic portion 43 is relatively increased and the elastic portion 43 is deformed when the air pressure inside the tire 10 is reduced as the variable wheel 1 is used. The sliding frame 20 has a diameter that is larger than the distance between the first sliding portion 21 and the second sliding portion 22 relative to the first sliding portion 21 and the second sliding portion 22 until the force of the elastic force of the first sliding portion 43 and the force of the air pressure inside the tire 10 becomes parallel again. And is transformed into a form of moving.

That is, when the air pressure inside the tire 10 is reduced, the sliding ribs 40 are stretched to enlarge the diameter of the sliding frame 20, thereby pressing the tire 10 and reducing the air pressure inside the tire 10 (Reducing the amount of air pressure reduction).

As described above, according to the variable wheel 1 of the present invention, when the sliding frame 20 is composed of the first sliding portion 21 and the second sliding portion 22 and the sliding rib 40 is disposed on the outer side of the outer ribs 41 And the inner ribs 42 are elastically supported so that the diameter of the sliding frame 20 is changed according to the change in the air pressure inside the tire 10 so that the change in the air pressure inside the tire 10 can be compensated, Thus, it is possible to obtain an effect of improving fuel economy, preventing uneven wear of the tire 10, and improving ride comfort.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.

1: variable wheel 10: tire
20: sliding frame 21: first sliding portion
22: second sliding portion 30: central axis
40: sliding ribs 41: outer ribs
42: Inner rib 43:
44: receiving space 45: first latching jaw
46: second stopping jaw

Claims (3)

Circular tires;
A sliding frame formed along the inner circumferential surface of the tire to support the tire and including a first sliding portion and a second sliding portion moving relative to the first sliding portion;
A center axis formed at the center of the tire and the sliding frame; And
And a sliding rib connected to the sliding frame and the central shaft and repeatedly formed at regular intervals along the circumferential direction of the central shaft,
The sliding rib may include:
An outer rib coupled to the sliding frame;
An inner rib coupled to the central axis and slidably moving relative to the outer rib; And
And an elastic portion that exerts an elastic force in a direction in which the outer rib and the inner rib are apart from each other. The method according to claim 1,
Wherein the outer rib has an end formed in a pipe shape and has a receiving space therein,
The inner rib end is inserted into the accommodation space,
And the resilient portion abuts the end of the inner rib within the accommodating space. 3. The method of claim 2,
A first latching jaw having a reduced diameter is formed in the outer rib end,
Wherein the inner rib end portion has a diameter increasing shape and is formed with a second stopping jaw which is caught by the first stopping jaw and is prevented from being separated.

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