JP2003341307A - Tire of wheel driven by frictional force working at tire peripheral side - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To maintain the intrinsic life of a wheelchair, a bicycle or the like, whose tire is driven by a roller or the like fitted on the side of a tire by solving the problem that the intrinsic life cannot be maintained due to the wear of the side. <P>SOLUTION: The life of a tire that is driven by a driving roller can be made as long as that of a conventional tire by increasing a tire thickness (t<SB>3</SB>) at the side, with which the roller comes in contact, to make it 40 to 60% of a tire thickness (t<SB>1</SB>) at the outer periphery. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle having wheels on the outer circumference thereof, the wheels having wheels driven and rotated by driving rollers arranged in contact with the side surfaces of the tire, For example, the present invention relates to an improvement in durability of the tire of the wheel in a wheelchair (FIG. 4) and some bicycles (FIG. 5). 4 and 5, reference numeral 1 is a wheel, 12 is a tire, 3 is a driving roller for driving and rotating the wheel, and 4 is a motor. The driving roller 3 may be arranged in contact with both side surfaces of the tire 12 by sandwiching the tire 12 (FIG. 6), or may be arranged in contact with only one side surface of the tire 12 (FIG. 7).

[0002]

2. Description of the Related Art In a wheel driven and rotated by a driving roller 3 arranged in contact with a side surface of a tire,
Since the tire 2 has a thick wall only on the outer peripheral surface in contact with the running surface of the vehicle, like the wheel on which the rollers 3 that cause wear on the side surface are not arranged, the outer peripheral surface is not thick enough to withstand use. Despite having it, there was a problem that the side surface contacting the driving roller 3 was worn out and could not be used. FIG. 8 is a diagram showing an example of the shape of a cross section of a conventional tire, in which t ₁ indicates the thickness of the outer peripheral surface and t ₂ indicates the thickness of the side surface.
The thickness of the tire 2 is various depending on the tire,
As an example of comparison of the wall thicknesses of the outer peripheral surface and the side surface, in FIG. 8, the outer peripheral surface thickness t ₁ is 5 mm and the side surface thickness t ₂ is 1.5 mm.

[0003]

To provide the side surface of the tire with which the driving roller 3 comes in contact with the same degree of durability as the outer peripheral surface.

[0004]

According to another aspect of the present invention, there is provided a vehicle having wheels on the outer circumference thereof, the wheels being driven and rotated by a driving roller arranged in contact with a side surface of the tire, The thickness of the side surface of the tire with which the roller contacts is formed to a thickness that gives a durability time that is approximately the same as the durability time against wear of the outer peripheral surface of the tire that contacts the running surface.

[0005]

[Operation and effect] By increasing the thickness of the side surface of the tire, the durability against wear due to contact with the driving roller can be increased to the same level as the durability against wear on the outer peripheral surface due to contact with the vehicle running surface. .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a radial cross-sectional view of a tire 12 according to an embodiment of the present invention shown by reference numeral 12, in which t ₁ is the thickness of the outer peripheral surface and t ₃ is the side surface. Indicates the wall thickness.
Since the present invention does not change the thickness of the outer peripheral surface of the tire, the thickness of the outer peripheral surface is indicated by t ₁ as in the case of the conventional example shown in FIG.

Side wall thickness t _{2 of the} conventional tire ₂ (FIG. 8)
Is a wall thickness necessary for tire formation without considering wear, and the wall thickness t ₁ of the outer peripheral surface is considered to be a wear allowance value and a wall thickness for protecting the tire tube when a foreign object is pierced. Can be thought of as something. Since tires are never stuck foreign matter to the side surface, the thickness t ₃ of the side surface of the tire 12 that drive the rollers are in contact, t 2 _{+ (t 1} -t
₂ ) It is suitable to be 40% to 60%. That is, the wall thickness obtained by adding 40 to 60% of the wall thickness difference between the outer peripheral surface and the side surface of the tire to the wall thickness of the tire side surface having the same size as that of the tire conventionally used for the wheel frictionally driven on the peripheral side surface. And

Rainwater or water used for washing the vehicle may be splashed on the tire 12, and the water may be caught between the driving roller 3 and the side surface of the tire 12 to cause stumbling, which may hinder traveling. The tire 12 of the present invention having a thick side surface can be provided with a groove as an escape route for the bitten water. As for the groove, as shown in FIG. 2, even if the groove 13 in the radial direction of the wheel is provided over the entire circumference of the side surface of the tire (claim 3),
As shown in (4), a plurality of grooves 14 may be provided in the circumferential direction of the wheel (claim 4).

[Brief description of drawings]

FIG. 1 is a radial cross-sectional view of a tire of the present invention (claim 1).

FIG. 2 is a view showing a plurality of grooves provided in the radial direction of the wheel along the entire circumference of the side surface of the tire of the present invention (claim 3).

FIG. 3 is a view showing a plurality of grooves provided in the circumferential direction of the wheel over the entire circumference of the side surface of the tire of the present invention (claim 4).

FIG. 4 is a diagram showing a wheelchair as an example of a vehicle having wheels that are frictionally driven on the peripheral side surfaces on which wheels of the present invention are used.

FIG. 5 is a diagram showing a bicycle as an example of a vehicle having wheels that are frictionally driven on the peripheral side surface in which the tire of the present invention is used for the wheels.

FIG. 6 is a view showing an example in which driving rollers sandwich a tire and are arranged in contact with both side surfaces of the tire.

FIG. 7 is a view showing an example in which a driving roller is arranged in contact with only one side surface of a tire.

FIG. 8 is a radial cross-sectional view of a tire that is conventionally used for a wheel that is frictionally driven on the peripheral side surface.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Wheel 2 Conventionally used tire 3 Driving roller 4 Motor 1 2 Tire 13 of the present invention 13 Radial groove 14 Circumferential groove t ₁ Wall thickness t _{2 of} conventional tire and tire of the present invention Side wall thickness of tire t ₃ Side wall thickness of tire of the present invention

Claims (4)

[Claims] 1. A vehicle having wheels on the outer circumference thereof, the wheel having a wheel driven and rotated by a driving roller arranged in contact with a side surface of the tire, wherein the surface of the roller A contact portion that is in contact with the generatrix direction of the tire is formed on the side surface of the tire over the entire circumference, and the contact portion has a minimum wall thickness of the contact portion, which is the durability time against wear of the outer peripheral surface of the tire. A tire of a wheel frictionally driven on a peripheral side surface, which is formed by forming a wall with a wall thickness having a durability time equivalent to that of the above. 2. The wall thickness difference between the outer peripheral surface and the side surface of the tire having the same thickness and the same material as that of a tire conventionally used for a wheel frictionally driven on a peripheral side surface of the tire. The wheel tire frictionally driven on the peripheral side surface having a wall thickness of 40% to 60%. 3. The tire of a wheel frictionally driven by the peripheral side surface according to claim 1, wherein a plurality of grooves are provided in a radial direction of the wheel on a side surface of the tire with which a driving roller comes into contact. 4. A plurality of grooves are provided in a circumferential direction of the wheel on a side surface of the tire with which a driving roller comes into contact.
1, Wheel tires friction driven on the peripheral side.